It is open all night, very good fishing on some nights. I normally fish on the breaker wall between the boats and the main lake, some nights the fish are behind the wall some nights they are in the main lake.
The carp guys do a lot of carping here and over by the ramp, they have caught some really nice fish. I have seen really good nights on channel cats out there as well, nothing huge but all a good eater size. I have seen guys land decent bass and saugeye out there as well.
The real benefit of this place is they have great showers and bathrooms over by the marina, that come in really handy when you are fishing the whole weekend. We had two Carp-Ins out there last year we liked it so much.