Great stay!
This campsite was about as good as it gets. The campsite is close to everything you might need/want to see. Mount Rushmore is only a quick 25/30 minute drive, there are multiple hiking trails near by, and several general stores for ice/wood, or anything you might need.
There was a $20 entrance fee into the park for the week. The restrooms were the cleanest we’ve seen and the showers were tidy too! There is drinking water on the outside of the restroom facility as well to fill up those water bottles.
Quiet and pleasant - I absolutely recommend!