How about while you are sitting in the warmth of your house doing your best "girl drink drunk" impression, you could get some of those little maitai drink umbrellas and stick one over each inspection port hole. Actually, I had the concern of water getting into my hulls here in Florida (doesn't freeze). I considered gluing some frisbees to a 9" piece of 2X4 to stick in each hole. That would keep the water out, but let it breathe too. Or better yet... you could turn the boat over and set it on some boards across the beams.

-Rob V.
Glad to be in Panama City
Nacra 5.2