My friends and i traveled 7,700 miles this summer. There was five of us aged 18 and 17. We had a blast but my suggestion for this kind of trip is do it in more then two weeks and dont be on a tight time schedule. Also, if you plan to drive through the night its not the same experience cause half your people are asleep the whole way. See as much as possible, stop in little towns, videotape, and do some exploring. enjoy the country, ive seen it and its great!!!