For those with RV's just looked and these are the best rated RV parks near Mt Rushmore:
1. Mount Rushmore KOA at Palmer Gulch Resort
2. Black Hills Trailside Park Resort
3. Larsson's Crooked Creek RV Resort
When you determine a specific location for the get together perhaps one of these will be closer than others?
Mt. Rushmore KOA was great. We were there 6 weeks ago for our first trip to Mt. Rushmore. I wish I could be there on election day.