We've camp here before, and it's a lovely park. The problem is that it is increasingly popular during the summer, so you have too book well in advance. When we checked on a Tuesday in late August, all sites were already reserved for the next four days. (We instead stayed at a campground in the Eckbeck Forest nearby.)

We still spent the day rock climbing in the park. The black flies were unbearable along the hiking trails though, so we ended our day hours early because we were getting painfully bitten so much, even with bug spray and long sleeves/pants.