I am in Arkansas and it gets as hot and humid here as in southern Georgia. My shop is also uninsulated (I need to put some pictures up), and in fact until recently was only a roof with no walls. I also used to spend a lot of time in southern, tropical Mexico and did a lot of woodworking there. The trick is to always take into account the movement of the wood, but that is a given regardless of where you are.
OWOF