My friends and I are planning a cross-country road trip. What states/cities/sites would you recommend seeing and why? Also what would be better/cheaper: Renting a camper van and spending the night at camp sites + fuel, or renting 2 cars and spending the nights in hotels + fuel? Thanks =)
There will be about 7-9 people travelling all together, with 3-4 couples and a few singles.
The trip is being planned from anywhere from 3 weeks to 3 months.

There are several starting points for us, LosAngeles, Seattle, Chicago, or New York and eventually ending in Boise.

Must see places include New Orleans, Grand Canyon, Chicago, Disneyland, Las Vegas but interested in smaller out of the way places too.

7-10 people with both couples and singles. Mainly ages 22+.

The group is interested in everything from museums to outdoor hikes to amusement parks and malls. Pretty open to anything. Most of them have never been to the US so anything will be new to them!

Thanks for the great responses so far!