We are also going to the black hills this summer. I would love to stay in Custer State Park but from the research that I have done, I don't believe any of the campgrounds have water or sewer hook-ups. Unfortunately, I will need them since there will be 4 adults in our rig, and we'll be staying a week. I'm already starting to become overwhelmed trying to find another really nice campground due to the fact that there are so many to choose from. Plus reviews can be confusing simply because a campground that one person loved, another hated. But hey, planning and getting there is half the fun right?!