I agree, FL humidity is a whole other beast entirely. I'm COMPLETELY a northerner; moved down here last August. This week, literally, was the first week I wore my braidout outside with NO SWELL. It was amazing.
I used KCKT as my leave-in, and braided with a mixture of Oyin's Shine and Define and Whipped Pudding. Good stuff. I love Oyin products, but I always use them with the Hair Dew (my fave leave-in ever). I mixed it up for the first time ever, and loved it.
For my puffs, I use any leave-in I feel, some type of liquid or spray syler/conditioner combo, and a generous amount of EcoStyler Argan. Some puff combos: CJ Smoothing Lotion+CJ CIAB+Eco Argan; Curls Creme Brule+Curls Goddess Curls+Eco Argan; SM Curl and Style Milk+S-Curl+Eco Argan.
My hair is not negatively affected by glycerin when worn pulled back. In fact, glycerin based products help my curls to "pop" when I'm wearing a non-stretched style. I believe it has something to do with the amount of moisture already in my hair. I say that because most of the products I have mentioned contain at least a small amount of glycerin, so if you're sensitive they probably won't work for you. HTH though.