I've received some input on the Florida Circumnavigation. Liz Sparks, Recreational Planner for Florida Fish and Wildlife Commission, suggested I put my plans for the trip on the Apalachee Canoe and Kayak Club forum. There are a lot of people from there that paddle sections of the Big Bend. If you would like to check their club site, their address is below.
A contributor to the paddling.net forum suggested I post on the Florida Paddling Trails Association. They have a site you may be interested in also, and have a large photo gallery. They maintain a list of those that have completed the circumnavigation, and show five people on the site that have done the whole trip.