Just got back from there! Nice people, close to the falls (15 min drive), clean, pretty decent size sites. Cleanest restrooms I have seen yet, nice showers (all tile).
The water fill is a little odd, they have water fountains around the place and on the back is a spot you can connect your hose for gravity fill. I would stick to the spots in the "middle" of the loops, or back by the lake. Some spots off the side of the roads have a pretty severe dip. Drainage was good after a couple of healthy rains.
They have a couple of dump areas so I thought that was nice that not everyone was lined up.
Don't be weird-ed out by no one on the roads near there, the park was pretty full but everytime we left it was like we were the only ones on the highway.
The pass you get, gets you into all the state parks for free. They have a camp store, I didn't go in, but the kids bought more rv tp and wood from there so they have that at least. We were in site 215.