I read about this state park in Trailer Life Magazine, where it was rated quite highly, and I now see why. It's a great state park--clean, forested, with a large lake, boat rentals, a pool, trails, waterfalls and streams (that you can swim in), horseback riding, etc., etc. We spent two days and three nights here, and had a great time. We probably could have spent another day to see the few other things that we didn't get to see. As I mention below, if you don't have a car expect to do a lot of walking or biking.
I was a bit disappointed with the site for our motorhome, though. I have a 30 foot long Class A RV, and our site was too short for it. The site was very unlevel, and because our site was so short, the front of the RV was only a couple of feet from the road edge, pitched down beyond the leveling capability of our RV. Backing up much more than we did would have put us into the site of the trailer behind us. For an RV of our size, they should have recommended a different site, especially when I told them how large our RV was upon making the reservation.
If you're coming to this park in a motorhome but you don't have a car, expect to do a lot of walking or biking. It's a big park and if you don't have a mode of transportation, it's a lot of "huffing and puffing" on foot or by bike up and down the hilly roads around the campsites. We were in loop D in a motorhome with no car and pretty much had to walk everywhere. Everything you want (trail heads, nature center, pool, general store, docks, etc.) is at least a 15 minute walk, sometimes longer, along combinations of trails and roads that other cars are using.