Keystone is only a few miles from Mt. Rushmore and a cute little town, versus driving 20 minutes from Rapid City. We stayed at the Holiday Inn in Keystone and thought it was nice. Custer State park was amazing. Definitely drive the Needles Scenic Highway. There is also Bear Country, Reptile Gardens and Cosmos nearby. We went in October so a lot of tourist places were already closed, but there are plenty of little gems to be found, just driving around that area--Prairie Berry Winery, good shopping deals, bison round-up... Check out TravelSD.com, and have them send you information.