Badlands and Mt Rushmore have several options unless, as was pointed out, you are traveling during the time of the Sturgis motorcycle rally in August. Try Rapid City, Custer, and Keystone as the most logical places.

For Yellowstone, you could try Gardiner or West Yellowstone, MT. Both have hotels in various price ranges; however, they could be booked. Truck stops and camping are the other options.


Donna