I don't know what the answer is but I do know that a100 yard from the bridge no wake zone, with as many bass boats that pass here, is gonna make the bridge and the welfare hole practically unfishable, especially on the weekends. I fished there in a 15 ft. John boat for a couple years and have come close to being swamped a few times by the rollers created when the bass boys throttled down to pass by. That's the main reason I bought a pontoon boat. 100 yards out is gonna create constant and almost neverending rollers all over that area. Be careful what you wish for.