Have a great trip and I hope you have some nice frontal winds while you are here. In the Tampa Bay area checkout the launch descriptions on http://www.tampabaykitesurf.com/downloads.html
or contact Johnny with TBKS to get tuned into things over that way.
For the rest of the coast you could contact a local FKA area coordinator via private email or post something on the FKA list asking to hookup with riders in a particular area you plan to be riding in. There are also launch descriptions for some areas of the state in the files section of the FKA site at:
For more search this site under "Florida" and checkout some of the posts from the last couple of weeks.