I am interested in the same question. I live in Jax FL but always go home to S.C. to hunt and that includes ducks. Found this site and brochure, I have heard of some good luck at Guana State park.
myfwc.com/duck/Duck_Hunting/duck-hunting.htm
http://myfwc.com/duck/Duck_Hunting/WhereToDuckHunt.pdf