Just a thought, and you may have already checked into this. Is there a way to get with whomever authority is in charge and get a special one-day exemption for this tourney to allow bigger engines at IDLE ONLY (similar to Summit Lake)? The benefit being the more you draw the more $$ they'll make (via ramp fees) and allowing larger boats would definitely be a big draw in my opinion. You could even extend this a bit and offer an additional 5% of entries ($5 per boat) taken in as a good will gesture. They could have security on hand that day patrolling the lake to ensure idle speed compliance if they were concerned.