Re: Need help planning a roadtrip!!
Plan a very basic route and go from there. Obviously, keep in mind some things that people here say are "must sees" along the way but otherwise keep it loose so you can stop at things that catch your interest. Local motels are great for finding flyers for local attractions.
While in wyoming, try to find a local rodeo to go to.*
If you're rolling through some one stoplight town and they have a museum, stop. Definitely stop if its free. If you see a sign on the road for a 2-headed or 5-legged anything, stop.
If you're cruising through Arizona and see signs for First Mesa or any of the other Hopi or other indian settlements/ruins along your path and they have tours, check it out. especially anything with really old ruins. They'll try their hardest to separate you from your dollar, but it's worth it to experience some American history from before there was an America.
Buy a cowboy hat. Go on a trail ride somewhere along the way, especially in the Tetons. Wear your new hat. You'll look silly, but who the hell cares.
Stop in Albuquerque (my favorite) or anywhere else in northern New Mexico, go to any decent looking mexican restaurant, and make sure you order sopapillas. If you're from San Diego, they're like fish tacos: You can get them anywhere, but they're just better there.
If you're at the tetons, it's worth it to check out yellowstone. It's only a few hours north. And If you roll to yellowstone, go out the west gate into West Yellowstone, Montana and drive north in 191. When you get to Ennis Lake you'll find a dive called Eno's. They have gigantic steaks for little money, but they make you cook them yourself. One of the best views you'll ever have at a restaurant. If you go this way, roll over to Virginia City. It's a tourist trap, but somewhat unique.
Stop at the first Prairie Dog Town you see.
That part of the country is just littered with all kinds of crazy and interesting places, so it's best not to have too firm of an itinerary. Head in the direction of something that interests you and see what you find.