I am coming to Rapid City on 9/10 and will be joining up with a tour group. I will be arriving 24 hours before the tour starts and want to explore Rapid City some. With the tour, I am spending 2 additional nights in Rapid City and we are going to Mt. Rushmore & Crazy Horse Memorial before heading out to Montana and Wyoming. I am renting a car and was thinking about doing the Mt. Rushmore lighting ceremony Sat. night and Sun. morning doing Bear Country USA. I have until 7 pm Sun. when I have to meet up with the tour group. I was wondering if anyone could give me some suggestions to do the rest of the day on Sun? I have read some about Custer State Park and may drive through that. How far is Custer State Park from Rapid City? I'm staying at the Radisson in Rapid City. I appreciate any suggestions.