I'm making my first RV trip during the middle of May. I've rented a 31' class A gas and I'll be traveling west from Chicago to Yellowstone via Rt. 90. Normally when in my car I would drive almost straight through, but in the motor home I'm thinking 400 to 450 miles a day is good. Any interesting stops or overnight RV parks you can suggest, I figure it will take me three days to reach Yellowstone. Yes, I have my Trailer Life Directory. Adults only just want to have fun for a week and a half or so.