We visited during the off season, November. It was fairly empty, which was nice. The biggest, and really only complaint, is that the sites were pretty un-level for being paved. The bathhouse was very nice... and I think the floors may have been heated?
We stayed at a full hookup site, which is unusual for us, but the facilities were great.
The road into the campground was steep and winding. We almost saw a van towing a large trailer tip. It was a bit scary. Make sure you watch your turns on the way in.
The best part was the location!!!! The entrance was right next to the entrance to Old Man's cave, which was epic.
Also, there was a small area to the east that had an interpretive trail that ended with a large cage with some birds of prey, it was pretty great.