In my experience, if tufties, swans or coots are a problem don't bait or fish until night fall, it's the only guaranteed way of not getting picked up. Coots and tufties normally drop a rig but swans are a pain. A few times I've just stuck in bait and just left the birds to feed during the day only for them to return at night to have another go. It's like they've ear marked the spot. The situation is only exaggerated close in, so, I wouldn't bait or fish until nightfall.