If you go to the RCI website (we don't have II so not sure if they do the same), you dont even need to log in, and click on 'Resort Directory' (under 'Resorts & Offers in the upper right part of the page), then browse by the map, and zoom into Florida and the desired area, all the timeshares within that area will be shown on the map. I use that quite often when we want to go to a specific area, it saves loads of time going through the resort listings to see what each of their addresses are.
~Diane
ETA; you can click on a resort you are interested in and a window will pop up to look for availability, but I think you need to be logged in to see that.