awesome piece of water
You will find lots of fish, and it will not be cold in May. Many places to fish from shore, and if you can get your hands on a kayak do it. If you are going with a guide you are set, and the guides down there were pretty free with the info. I asked my guide if he minded if I jumped his spot the next day on my own, and he was nice enough to say no problem, and even turned me on to other flats with specifics. Unlike the keys, the bottom is hard enough to wade on.
Its a great place, have fun and catch em up