We camped 2 nights and 3 days here. The campground was pretty nice. We had a non-electric site (159). It had extra space and was next to the bathhouse. There were some trees there that my kids could put up their hammocks during the day. Nice and level and had a large tree there as well. Was also right next to the camp host site, if that's something that's important to you.
The bathhouse was really, really nice. Very clean and spacious. However, there was no hot water. I think this was just a fluke, the camp host said they had just had issues with the hot water heater. We just walked to another bathhouse for a hot shower (those weren't as nice but, hot water so...).
The park itself is just okay. The Trail 7 hike was a little disappointing. You could see the falls but not super well. It's one that you need to do to see the falls but not my favorite hike there. The best hike, in my opinion, was Trail 6 to 5, then down to 2, and back up to 5, finishing on Trail 4 at Hoffman Falls. Lots to see on that hike and not very crowded.