The Family Campground for the 2017 Cadet International Camporee will be at the Custer / Mount Rushmore KOA near Custer, South Dakota on US Highway 16. To contact the campground directly, please use the phone number under INFO. After September 30, you may need to wait for a call back since they will be officially closed for the season. Campground Photos from Custer / Mount Rushmore KOA website Contact Info Website: http://koa.com/campgrounds/custer Open: May 1 - September 30