Thankyou DObby for pointing me in this direction for advice. Ok, we are planning our trip to Montana, Wyoming & S.Dakota for August 2015. Flying into Rapid City around the 21st, This is our plan, I know it might sound really stupid but we want to avoid any scary roads, plus we really do want to see the places on our list. 1 night Rapid City, 1 night Sheridan, 2 nights Livingston, 1 night Gardiner, 2 Old Faithful, 3 Cody, 1 Old Faithful/Snow Lodge, 3 Big Sky (like the idea of a rest at Rainbow Ranch), 3 Bozeman, 1 Billings, 3 Deadwood and the last night in Rapid City. Absolute chicken when it comes to scary/safe roads, getting lost too!! We think keeping to the I 90 will be the best, important part of the trip is Custers Little Bighorn and Old Faithfull. Do not want to attempt Beartooth or the BigHorn, would rather go round. Going down 89 and coming up 191 are these good? Would appreciate any advice, like I said I'm a scared chicken so be gentle with me. The whole trip will be based around Old Faithful, know I have to book early, so possibility of tweaking here and there. This is the Big One and most of all we want to enjoy it!!!