With the kind of area you are talking about, if there is a pretty big lack of cover I would think that anywhere you put in cover would draw fish. If crowds are a problem sink brush a good half mile away from where they usually congregate. PVC is harder to see on the depth finder. If they only half way know how to read a depth finder they won't find em. Just make sure you use a gps to mark them so you can find them easier. CF