Keep it simple. If you open the inspection ports and take out the drain plugs, I think you'll be surprised at how quickly the boat dries out, even after just a week.
If the boat is exposed to the sun and no rain is allowed inside, they dry very quickly.
If you keep the boat inside this is true. However when I keep my cat outside water condenses in the hull. I can empty out my hull before leaving the prior week and the following week I always get another cup or two of water out of my hull.
This is part of the problem with leaving boats out. The water is constantly condensing and evaporating inside the hull. This is what causes the hulls to eventually delaminate.
Mike Hill
www.stlouiscats.com 
