Good morning Capt. Steve,
I am south of your position (two counties)and a couple hundred meters from the mangroves.
I have 13 ft Williams and 11 ft Williams that went through the light freeze we had here Jan 2nd or 3rd. The larger was not harmed by the 31 degree F temps that persisted for 4 hours. The smaller one had slight damage to the leaves. The Musas that did better in the freeze were the FHIA-1, FHIA-2, FHIA-3, FHIA-23, FHIA-25, Ice Cream, Raja Puri, and Dwarf Namwa. With the exception of the Ice Creams and Williams, all of them were small (less than 2 ft) and had been planted in November and early December. My 6-7 ft Mahois were damaged the most in the freeze.
I like the Williams for their cold tolerance but the FHIA-23 might be worth considering.
Best wishes