Your professor fishing buddy sounds like a great resource, and I kind of agree with him. That has a potential to end badly. It is not a direct cull of only one kind of fish you can do yourself. Homeowner's associations can be borderline facists. But normally they are clueless and have no idea what you are doing anyway. Does not sound like you can set up a segregated bait area. You have to cull, sad but a fact. That will also give a better opportunity for your projects to have an effect. I'd start catching and not releasing 8-10 inches or totally emaciated. So the limestone quarry had vertical water movement rendering it useless, who would have thunk?