First the good: the campground is big and spacious. Some areas were like RV parking lots- no trees, no shade, but there was a grassy area in the middle with nice big trees and shade. There is a nice pool and splash pad. Weirdly, the pool closed from 4 to 5, leaving us with nowhere to go on a 90+ degree day.
Now, the not-so-good: we stayed in a camper cabin and it was very shabby and dirty. It had bunkbeds, a full size fridge, and a folding table and folding chairs, which was nice (and rare in Ohio state park camper cabins). The bathrooms were average. Not new, not especially sparkling clean, but fine. Not gross, at least.
Now, the terrible: the entire lake stinks of pig poop. All the air smells like poo. You feel like you are breathing feces when you approach the water. We were right on the water so we couldn't escape the smell.
This lake is notorious for having algae blooms that prohibit swimming. So I did a google search before our trip and the Ohio Department of Health reports that the bacteria level in this lake is dangerously high, and no one should swim in this lake. However, when we walked to the campground beach, there was no sign or warning or anything indicating the bacteria in the water- and people were letting their children and dogs swim in it!!
We opted to not kayak or paddleboard in the lake because it was clear that it was full of poop. So we had nothing to do at the park except go to the pool (it was too hot to do anything else). We ended up driving around the country roads and seeing the sights so we could escape the smelly lake and hot poo fumes. Neil Armstrong was born in nearby Wapakoneta so there are some sights to see there, and the towns of Celina and ? one other are cute too.
Overall, I will not return to this lake or this part of the state. If you can't get in the water, paddle board or kayak, the only thing left to do is ride around in a boat and hope the water doesn't get anywhere near your mouth or your skin. No thanks.