Since I can't find a "Venture" County in the US, maybe you're elsewhere or maybe you're in Ventura County with a typo. Location means much for moisture control. As Southern California
is dry and the water
is cold, your best strategy would be to rely on more insulation
where warmer moisture laden air in the cabin
meets to cold inner surfaces of the hull
. If you're somepace else and in warmer water
this hull insulation
will be less important, but ventilation will be important anywhere.
We are in the humid SE US and we like to hang moisture absorbing "Damp-Rid" bags in some lockers.