From jct US-36 & Hwy-235: Go 5 mi N on Hwy-235.
A small, but very nice and clean park. It was better maintained, and less covered in litter compared to other state parks in western Ohio. The swimming beach was clean and not crowded, the marina was in good shape and well stocked, and the lake was beautiful. We didn't stay the night, but the campgrounds looked nice. Good place to swim, fish, or kayak.
Will add photos later.
Kaiser lake is our absolute favorite camping location. There's a beach within walking distance with a playground. There's plenty of space. The lake is a no motor lake, so it's very quiet and peaceful. We tent camp and bring our canoe and have the best time. Our two girls take time off from electronics to play and enjoy the outdoors, and it's wonderful. We even had our tent blow completely down in a storm, breaking it, having to sleep in our truck, and still had the absolute best time. 10/10 would recommend!
Great campground. We loved being right by the lake. I would have given 5 stars but it was cold and so I didn't get to fully see the whole park nor enjoy its amenities.