Spent a night in route to the Badlands and was happy enough with the experience. I felt like the sites were a bit close together, but for a night that wasn't a huge concern. Seems like during a busy weekend it could get loud and chaotic, but on a week night in the fall it was nice.
Enjoyed the water setting! After driving a day of driving and checking out the Corn Palace, just 5 minutes away, it was nice to be in nature again in a lovely location :) Facilities were clean and the staff we encountered were friendly.
If you have a tent I encourage you to choose a tent only site since they are more secluded.
Stayed here on the last night of a 2 week road trip. Didn't get in until very late but there was still a few sites open that you could pay for one entering the campground. Bathrooms were nice and clean and the campsites were solidly spread out. Our campsite was literally right next to the lake!