Plenty to do but plenty of people, too
This is actually two different campgrounds -- North and South. The North Campground has larger sites spaced a bit apart to afford you some privacy (or at least as much as you can expect at a state park campground). The grounds and facilities looked to be in good condition, too.
The South Campground (where we stayed) has smaller sites that were much more closely packed together. There are non-electric sites that are a bit deeper but still quite narrow so your neighbors may be right there when you look around. The facilities in this campground also seemed to be in good, clean condition.
The one thing that was bit unnerving was that throughout both campgrounds, there are sites on the outer edge that are next to a main road with nothing but a small, wooden split-rail fence dividing the state park from the outside world. While the park is in a rural area, it still seems odd to have zero security for your site and your belongings from anyone who just happens to park on the road and wander in.
This seemed to be a popular campground for families -- especially little kids on bikes, so be extra cautious when driving around or even riding your own bike because the kids seemed to have no concept of safely riding around. They would often change direction or dart out unexpectedly.
Things to do include a good-sized, no-wake lake that was a pleasure to use our kayak on. There is a small beach that seemed popular, although the signs warning about all the dangers in the lake made us question entering the water for swimming. There also is a hiking/mountain biking trail that goes around the lake. It wasn't well-marked and seemed to just be a series of connections through some woods, down roads, and across parts of the developed areas of the park. So, not a terrible experience but just not what we expected.