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.