FYI to Will and Jeff,

Our 18 takes on water when sailed (another story) but has been torn down for over a month, rudders removed, ports and plugs open with a tarp over everything except the hulls rear of the crossbar, on the trailer, transoms high in the air. I know the flotation foam has dried because every few days I was lifting the tongue of the trailer up for two or three minutes, letting the water drip out. It stopped dripping about a week ago, and since then it has rained more than once.

I just now walked inside from standing there with the tongue on my shoulder for at least 90 seconds. No water got into the hulls through the drain plugs from the rain. A miniscule amount of water could possibly enter the hull from melting snow, but I would'nt count on it.