If I found the right park, it looks like it is set up to be a put and take fishery. According to this
they stock it every night. Fished a put and take spot in Detroit area, they'd stock it, let the fish sit, do catch and release for a bit then let folks take them, though they'd take them before allowed. It was packed as well. Wasn't really much fun but after a cold Michigan winter it was something. Don't know that I'd do it now.