Yellowstone, Grand Tetons AND Glacier. Of the 3, I like Glacier the best. A lot less people and incredible beauty.
Add in Yosemite but only off season. It's a zoo during the summer.
San Francisco. There is so much going on in that city, it would take at least 5 days to take it all in. From the zoo, golden gate bridge, Levi stadium, all the civic centers, Golden Gate park
We didn't like Grand Canyon. 2 or 3 hours and had seen enough.
The everglades was pretty wild.
Disneyworld and Disneyland. they are not the same. Both are great, each has it's own personality and feel.
If you seek adventure, retrace the pony express route, the continental railroad, the Oregon trail. If you read up on the history first, it will make for some thoughtful campfire stories. For example, we camped on a creek where indians raided a wagon train heading to Oregon. A young girl was abducted and the soldiers at the closest fort were too frightened to head up a rescue. One section of the Oregon Trail had 10 graves average for every mile, marked with piled stones. Things like a piano dumped along the route only made the mind and imagination go tilt to the stories that must have lead to that.
If you enjoy skiing, Lake Tahoe is great. Heck, it's great any season, just less crowded during the winter. Try a full-moon night time snow shoe hike to a big meadow with campfire and a chuck wagon waiting to fill your belly. Or a sleigh ride through a meadow, a tram ride to the top of Squaw Valley, home of the winter Olympics where 'High Camp' has a beautiful skating rink, hot tubs next to the ski runs and award winning spas and dining. Put the kids in ski/board lessons and do the spa thing, then get together as a family for all sorts of resort activities.
