This campground is located in Wind Cave National Park and hardly ever fills to capacity. It is first-come, first-serve and $9 a night until they turn the water on and it increases to $18, but it’s a nice serene area with bison just outside the gates! You are surrounded by wildlife, and they have wonderful trails, 2 of which are pet-friendly. I stayed overnight to camp and got in line early to get tickets to the Entrance Cave tour. The tour was wonderful!