We camped at the primitive (south) campground this weekend. There are beautiful trails, a bazillion places to fish, boat, hike, picnic, and nature-watch. The bathrooms at our campsite were decent (although no showers). There is free firewood for registered campers (we had no idea, and had already gone out to purchase some in Solon, until we were driving around to find a better site for next time and saw a tiny sign on a wooden structure kind of tucked away at the northern part of the primitive campground). There was nobody at the campground, that we found, to answer any questions or check in and we discovered that the boat rental place was actually closed for the season (check their Facebook page instead of Google, cause we had erroneously planned on some boat activities and realized we were ill informed).
We had chosen a site next to the lake, but had a constant stream of people walking in and around our site to go to the lake, bathroom, trails, and playground. Day and night we had no "bubble" of space. They would walk within a foot or two of all our stuff and often were speaking very loudly and (when dark) flashing lights at our tent. We also had to listen to loud music all day and until around 11PM, dogs barking non-stop, kids yelling from the lake/park back to their site, kids gatekeeping the bathroom, etc. While all this is "normal" and camping is a mixed bag... it really was amplified by the way the campground is laid out and the site we chose. Highly recommend tucking yourself in the northern area of the primitive campground vs the southern area. The sound is buffered better with trees, there's less traipsing through your site, and a bit more privacy (although not by much).
Overall a beautiful area with lots to do (more in the obsession, but still plenty without the boating or camp office) and a mixed bag of possible human obstacles that can help you master your patience.