My guess is that they are out there for the sailing and to experience the "back to nature" thing. Mary, are they on Nest Key? If so, the outhouses were still there on January 2nd, although a Heron or Egret has built a hugh stick nest on top of one of them.
Jack Hoying
Fort Loramie, Ohio
Prindle 18 #1645
http://www.bright.net/~jmhoying/sailing/prindle.htm