Has anybody fished the drowned river mouth by Grand Haven? From the map, it looks like I'm talking about the area below about 144th Ave. I know people sometimes hook flatheads off the piers at the mouth. Is this because that's where the fish are or because that's where the fishermen are? There should be some big fish in the lake-like area but I have no idea where. Any information, positive or negative, would be appreciated. Thanks.