I live wiht girlfriend on my Pearson 424 on the West (wet) coast of Canada. The best investment we made was a dehumidifier. You can get e good one for about $200. No more mold or mildew anywhere. Check out the video below for an idea what it can be like when the wind pipes up Check out about 1:56 into the video, it picked up to about 60knots around that point.
YouTube - Quadra Island Storm Nov 07