Ha!

That would certainly fix the short-season problem.

"New Hood Canal shrimp season announced -- 7 days/week, May through April. Must use at least 10# of ballast. No motorized devices allowed."

It's possible, BTDT, but a real PITA unless you are a big honkin' specimen or a glutton for punishment. I also think most of the buggers manage to find their way back out of the trap during the puller's inevitable rest stops.