You have a wonderful jam packed trip coming up. Are you going to go to the Stave Church in Rapid City? There is a beautiful view of the valley there. I really loved the history of Deadwood. It was one of my favorite places during our trip out west. One thing I will recommend is...plan to drink plenty of water. We drank probably 64 ounces or more daily! That time of year is hot but the air is dry so you don't realize you are getting dehydrated until you feel it.