I used to have an annual kick-off meeting down there each year in Jan. I took extra days and headed down thru the keys, and although it wasn't the best time of year there was plenty of action in Jan. Bonefish, 'cuda, and an occasional tarpon busting on pilchards kept it very exciting. Not many bones but some huge smart ones and I was lucky to get into a few bones around Matecumbe Key on southward.
Chat with Capt. Ben Iannotta Jr of Somerset Key about what's happening down there. Bonefish Bob's is a must. There is a serious contingent of flats guys down there as you know, some of the real hardcores we'd ever meet for sure.
My schedule will not allow it this year but please keep me on your list of co-conspirators in future years for March/April.