I am going to the Keys at the end of March, did you bring your own kayak or did you rent one? I am staying near Big Pine and will either be looking for a guide or a rental?
I brought one. Hobie dealers are north in Key Largo or South in Key West not sure if they rent though. I have a 14' Enclosed Trailer that we haul down so it was no problem. I looked a little into finding a guide down there just to find some local spots and tips. Spent most of my time working the mangrove flats and back water. Live Shrimp works for most things down there. I also had good luck with Gulp Shrimp on a Jig head for Barracuda in the Flats. The bridges in and out of Big Pine should hold some good fish. If you haven't been, check out No Name Pub while your there.