If you are going to go to the Florida swamps you might take this hint. Go see your local pharmacist(I think that is the way to spell it) and ask him about vitamin B1 or B6. I cannot remember which. You start taking large doses of it about 5 days before you go out into the swamp. Your BO has an sharp iron smell to it but the snakes and bugs hate the smell and you might get away with fewer bites than bug spray. I used to use it when we went on long camping trips. When we sat aroung the campfire at nite, everyone else seemed to be getting eaten alive by the various bugs. I would hear the mosquitos buzzing by my ears, but never stopping for a snack.
