You may want to consider non-cotton, quick-dry clothing as you may have limited ability to wash and when you do it needs to dry quickly. Usually it's labeled something like CoolMax or something like that. It's really just a special breed of polyester used in high performance fabrics.
Because of the heat and humidity down here, cotton gets damp with sweat and stays damp and can cause rashes and chaffing. Especially underwear and socks. Go spend $15 bucks and get some Body Armor (or Dickies quick-dry undies and shirts for less if you can find them). You can also find quick dry cargo pants, but I'm not sure how they will hold up to thickets and tough work. The quick dry stuff tends to prick and snag pretty badly, but man is it more comfortable. Even if you wear non-quick-dry outer pants, the quick-dry under garments will at least wick much of the moisture away from your body.
I live down here and wear this stuff most of the time or else I always feel damp and uncomfortable. It's worth its weight in gold when it's 100F and 100 percent humid. If you're going to be in the sun all day, you may want to consider light fabric, light colors, long sleeved shirts to keep the sun off. When you're not wearing a helmet, consider a broad brimmed hat of some sort or else your ears will get parched.
Lot's of sunscreen & repellant.
Drink lots of water and don't allow yourself to get thirsty. Drink, drink, drink (water that is).