Stayed for 2 nights in Site #3. Was called prior to arrival regarding checking in. Missed "closing time" but went to site and checked in next morning. The Park fee is not included in the camping fee with is a bit of a pain, but I actually received a partial refund since the Senior rate was not included in my reservation.
Plenty of well marked trails to hike, a nice lake, beautiful spring, and if you are interested a thorough Museum about the Civil war prison camp that was located on the grounds. (Note: there is no swimming at the spring)
Sites are level with good power and water. I felt they were a bit close, but we are not campground people. #3 seemed one of the most private, even though right across from the Hosts and near the Bathhouse. The Bathhouse was very clean and new.