No Longer Here, BY CHOICE
Just a suggestion, you might try and put some type of rutter(I'm sure its not called a rutter) on the back of it so that when the wind blows the opening will always be away from the wind.
As for floatation, how about pool noodles!! They are about a buck each and you can cut them to whatever length you want. I know for a fact that one of them will float 280 pounds!! I have a boat project that I am working on that required me to remove some factory installed flotation foam. I am replacing it with sections of pool noodles to retain the bouyancy. It will all be under the deck hidden. I'm sure it could be hidden on a duck house as well.
RRBrown, knottscott and many others were banned, they didn't just leave. They were banned for standing up to the new owners that are destroying this site. Come join us all at woodworking chat, the best new woodworking site on the net!!