Hi

It is true that you can wet from inside but please please please
remember what water weight. Acturly I heard a few times from old
sailors, how wooden lifeboats broke when a new captain wanted to ensure
safety onboard , realy a boat hull can contain quite a few ten of tonns
and if you fill up a hull by accident or porpus you will se some
dameage out of reach of any repair.
Please "wet" but please know that you will get just as much from the
humidity in the air if just the bottom are covered than from pouring
tonns of water in just asking for trouble.