I'll be driving from Indiana (near Chicago) to near Yellowstone Park in mid July and returning in mid August. I would love to have someone else along for one or both parts of the trip (I won't actually be going to Yellowstone for that whole time, although I'm going to try to see it, but most of that time I'll be working nearby at a kid's camp). I am flexible about how long it takes to get out there, I can do some sightseeing on the way or just get there as fast as possible.
I'd also be willing to pick people up along the way-- I'll be going through missouri, nebraska, utah...
reply or email if you're interested!