Headed to the Bighorns!

Have camped at Tie Flume and Sibley Lake and recommend both. And have camped at Ranger Creek. Drive all the way ti the ranger station and cross the bridge to the campground. Check at the ranger station. They had a trout pond for kids to fish in. Lots of stone collecting by the creek. Take supplies as you are a ways from any conveniences in the Big Horns.
Also check the campground reservations on line. During the week there is lots of availability, not so much on the weekends,

This site will tell you about each forest service campground:
http://www.forestcamping.com/dow/rockymtn/bigh.htm

we looked at almost every campground across the bighorns on 16 and then drove up and looked at 3 or 4 on 14.
Across 16 we found Sitting Bull and South Fork to be nice campgrounds. Also up by the lake (Meadow Lake?)is a campground that will hold you ok. There is a dump station up near the top of the pass.
The town of Ten Sleep has an rv park on the west side. it's very shady, has full hookups and a nice owner. Bathroom is so so, but not too bad.
Up off 14 highway, near Burgess Junction is Sibley Lake, with elec hookups on a lake. A few miles east is another campground that's real nice looking. And there's a third one we didn't look at that is west of Burgess Junction. There is a dump station at Burgess Junction. Do not take 14 A going up or down. It is a very tough climb or descent...very tough.
If you feel you can hike it, do go and take a look at the Medicine Wheel, but you have to hike the last mile and it's uphill. There is a bathroom at the top. If you're handicapped, they let you drive up there.
Bon Voyage.

we've been to the bighorns a number of times. some favorite camping spots for us were:

west tensleep lake (north off of hwy 16 on forest road 27) the turnoff is just past meadowlark lake) it is a nice small campground with some sites right on the lake.

tie flume or dead swede (east off of hwy 14 on forest road 26) have seen moose and mule deer in that area.

medicine lodge historical site has a campground (northeast of hyattville off of hwy 31) a nice little campground run by the state of Wyoming also includes some sites along the creek. a shortcut to it from hwy 16 is to turn north on nowood rd just west of tensleep.

don't miss a stop of a night or two at devils tower nm. nice campground inside the park. belle fourche cg

we also camped at big Sioux recreation area near Brandon sd (just east of Sioux falls sd) on the way out and back. very nice and is run as part of sd state park system.

wall drug and the badlands. wind cave or jewel cave in the black hills. mount rushmore. circle b cowboy cookout is the best one in the black hills (we've been to the others, too)

Beautiful country! Make sure your brakes are up to snuff. You're gonna need them.

We have crossed the Bighorns three times on our way home from Yellowstone. Twice on route 14 and once on route 16. Our only camping experience was last year, an overnight at Tie Flume Forest Service CG off route 14 a few miles from Burgess Junction. A beautiful location with a stream running alongside the campground.

While not much specific to the Bighorns, DesertHawk has given you enough things to do to fill a couple of months.

I do not have any first hand experience in camping in the Bighorns. Camping in the Bighorns Nat'l Forest

We drove up & over them from Sheridan on US 14 & took the 14 A down (a very steep descent & one I wouldn't want to do again). BighornMountains.Com

We passed the turn off to Medicine Wheel, but didn't go see it, on 14 A. I've wanted to see the site.

Routes Crossing the Bighorns

My son & his family drove up a Crazy Woman Creek looking for a campsite. Not sure if it was by Buffalo. Said it was a nice area, but they didn't camp.

Years ago, we did a layover in Buffalo (trouble with the pickup) one sunday & an overnight. We rode our bikes around the town, went to a museum & by a city swimming pool. Things to do in Buffalo Your kids might enjoy a day at the pool.

US 14 & 14 A Video US 14 A was a harry drive, extremely steep. Video: US 14 A I believe the steepest parts are after the Medicine Wheel exit.

Area South & East of Buffalo: Overnighting Sites & Sights in the Douglas & Wheatland Area. Includes Guernsey & Fort Laramie Area.

Guernsey State Park ------- Fort Laramie National Historic Site ------ Oregon Trail Ruts and Register Cliff

Cody is a neat place. In Cody, try to see the Buffalo Bill Historical Center with Five Museums Under One Roof. http://www.bbhc.org/

These 4 were really great:
Buffalo Bill Museum
Whitney Gallery of Western Art
Plains Indian Museum
Cody Firearms Museum

The Cody Chamber of Commerce has a nice Visitor Center (full of information) & with a really nice art gallery.
http://codychamber.org/visitorcenter.html

Never been to it, but they have a Cody Night Rodeo with rodeo performances every night June 1st through August 31st. Gates open at 7:00 p.m. with rodeo action starting at 8:00 p.m. http://www.codynightrodeo.com/ And a Cody Stampede Rodeo July 1 to 4, http://www.codystampederodeo.com/

South & East of Cody: We've gone by Thermopolis, WY twice to do a soak in the hot spring water at the State Bath House. Very neat. We overnighted in the Wind River Canyon in Aug '09 & at one of the Boysen State Park campgrounds by the lake some years ago. But each time, we had already gone to Yellowstone, before stopping.

thermopolis.com/todo/hot-springs-state-park/

Thermopolis is up US 20 from US 26 at Shoshoni; West of Casper. Or South (Down) of Cody.

Between Gillette, WY & Spearfish, SD on I-90: Devil's Tower. Very interesting place. Nice CG in the Park.

South & East of Spearfish: Black Hills Area of SD.

My son did an overnight at Bear Butte State Park, somewhat northeast of Sturgis. Near Bear Butte Nat'l Wildlife Refuge. A neat area he said.

If you were to use I-94 E to get back to MN:

On 1-90 between Billings & Sheridan, Little Bighorn Battlefield Nat'l Mon't has a special place in history. Not far from Sheridan.

East of Billings on 94, we drove by Pompey's Pillar not knowing what it was in 2009, about 25 miles east of Billings, Montana, on our way to Yellowstone. "It bears the only remaining physical evidence of the Lewis and Clark Expedition, which appears on the trail today as it did 200 years ago. On the face of the 150-foot butte, Captain William Clark carved his name on July 25, 1806, during his return to the United States through the beautiful Yellowstone Valley." Might be worth a stop, if time allows.

On the western side of North Dakota 27 miles east of the Montana state line, Theodore Roosevelt National Park is very worthwhile to see. The South Unit entrance is in Medora, ND. Medora is accessible via Interstate 94 Exits 24 and 27 in North Dakota. T. Roosevelt is a really nice place to see Bison, at times even in the campground. We visited both units that year. North unit is more into the oil boom area. Road was good back then, but after getting more into the boom area, lot of truck traffic. Maybe worse now?

The colorful Little Missouri River Badlands provides the scenic backdrop to the park & home to a variety of prairie plants and animals including bison, prairie dogs, pronghorn, elk, mule deer and wild feral horses. T. Roosevelt.

The Painted Canyon Visitor Center is located 7 miles east of Medora on I-94 at Exit 32.

The ND Badlands are in TRNP as mentioned. Very neat shapes & colors. Not been to the SD Badlands, can't compare them.

Near Bismarck and/or Mandan, ND, Fort Abraham Lincoln State Park is interesting. FortLincoln.Com

North of Bismarck on US 83, The North Dakota Lewis & Clark Interpretive Center between Bismarck & Minot at Washburn. Not sure about overnighting, but neat to visit, nice place to take a break. Pretty vista.

Not far from Washburn, the Knife River Indian Villages Nat'l Historic Site was very interesting.

More toward Minot on 83 N, Lake Sakakawea State Park with links to other sites. Also in the area, Cross Ranch State Park.