The closest desert to Florida is not exactly close. So it sounds like you're planning for "the big one", as in a semi-permanent long term bug-out. For that scenario I would be more focused on stocking up my destination in advance (and securing it) than in taking everything with me in the heat of the moment. I would also study up in advance on desert survival, which would be quite different from Florida survival. Those two locales are on different ends of the environment spectrum. And probably on different ends of the social spectrum as well.