Jose Ferrier did a promotional film for Leisure Properties, which was trying to develop the west end of Big St. George Island (which they did) and the eastern half of Little St. George Island (which they ended up selling to the Nature Conservancy, and eventually to the State of Florida). Here's the promo :
(sorry, can't directly imbed vimeo clips, you'll have to click through)
25 or so minutes, and a tad cheesy, but it is still a good watch. I'm guessing circa 1977. I recognize a few faces, a few buildings(!), and a few boats. And all of the land.