Hey jn8745, Welcome to the forum! Great people with great information, if one is to ask.
I have a 46 year history with Yellowstone and will be back again this summer. If you wish to PM me, or anyone else, please do. Rather than dwell with the size n' such, let me just give you something to think about. There are approx. 1,200 campsites, total, in the campgrounds in Yellowstone. Only one has hookups. Tetons has a few hundred more sites, but is 1/7th the size of Yellowstone.
The National Park and Forest Service campgrounds were essentially conceived and built during the post World War II era, when the explosion began for touring National Parks. The latest Yellowstone campground was built early in the 1970s and the last one improved in 2014, at Fishing Bridge (full hookups/reservations required). Very few of these sites are drive through. The majority are Jug Handle or drive in/back in sites. What you will need to know, all park service sites across the nation cater more to the RV 32' and shorter. (Yes you will see I will be shouted down on this representation) but it is true and often discovered when the priority is the RV with the longest length and most slides.
Your provided information (23'+/-) shows that you will be fine with your truck and camper. In NPS campgrounds pay attention to overhead limbs and parking logs and posts, at ground level. Remember that the roads and pull out for sites and exhibits are not friendly for large RVs. The NPS policy is now to reduce or eliminate RV parking in many areas, now and in the future. Bring a "get around vehicle" or renting a vehicle, in nearby communities, will be worth it to combat the anxiety in many parking situations.
Also, adhere to the campground rules and recommendations concerning food, food preparation items and their use and storage. You are in Bear, Wolf, Coyote, Foxes country and the worst offender of all, various types of ground squirrels.
Also, you have not shared your anticipated arrival time and that would concern me more than the length of your camper. May to early to mid-June will be fine but confirm the opening dates of each campground. Arrive and acquire your designated campsite early in the morning from Memorial Day to Labor Day. During the month of July, get in and get your site no later than 9 AM. Arriving late, don't waste your time and gasoline and get a site outside Yellowstone, for the night. Arrive early the next morning, again before 9 AM or earlier. Yes you will hear some write; "I have always gotten a site." But I have had to deal with people that went hiking all day and come to me after 5 PM everyday and state; "Now we are done hiking where do you recommend we get a campsite?" Expectations are often not met. Tetons are the same in the month of July. For Fall season, verify the schedule of campgrounds and their closing dates.
If you are new to Yellowstone be ready for driving a lot to see many of the important locations. For me, the best part of Yellowstone is found an hour down a trail, in any direction. A good plan is to split Yellowstone geographically into North and South sections. Or utilize the northern campgrounds in the Tetons. I would explore the idea for Grant Campground for Southern exploring and Canyon Campground (or Madison Campground) for Northern exploring. Also, confirm road closures and repairs scheduling when entering Yellowstone or their website for up to date information (especially anyone visiting Arches National Park this coming summer season).
Also be aware of the entrance pricing to enter Yellowstone and Tetons. It becomes a shock to many. Consider an Annual Pass. Yellowstone uses inbound and outbound checks to verify proper and current permitting for Visitors. If you have a 4th Grader, in the vehicle, have them get their free pass for the season that will allow all the occupants in that vehicle free entry. Same goes for Seniors 62 and older with a purchase of a lifetime pass, for $80, also including campground discounts as well as discounts for other services available in all US fee sites.
One last plug for all National Parks, visit the Visitor Centers and ask questions and get local information. Go to at least one evening Park Ranger Campground program and learn about the parks, as well as discover the most exciting way to gain a National Park experience. There are often short Ranger led hikes and wildlife viewing with a Ranger available. The Ranger will also enjoy you experiencing the park with them.
Have fun and donโt miss a visit to Yellowstone and Grand Teton National Parks.
b
08 F550-4X4-CC-6.4L Dsl-206"WB GVWR17,950#
09 Lance 1191
1,560wSolar~10-6vGC2-1,160AmpH~Tri-Star-Two(2)60/MPPT~Xantrex 2000W
300wSolar~2-6vAGM-300AmpH~Tri-Star45/MPPT~Xantrex 1500W
16 BMW R1200GSW Adventure
16 KTM 500 EXC
06 Honda CRF450X
09 Haulmark Trlr