First of all, you will want to make sure you are eating and drinking water throughout the day. We provide Gatorade and Electrolyte replacement drink mixes to help keep you hydrated and feeling good throughout the day.
Stay wet! It can sometimes be easy to forget, but you will have a giant river full of water to get yourself wet in. When you start to feel uncomfortable and grouchy from the heat, remind yourself to jump in or dump some water on you. Having a sarong that you can dunk in the water and lay across your neck or lap can help tremendously. Wearing cotton shirts that stay wet and cool on hot days can also help. On warm nights, you can soak in the river for a few minutes before climbing into bed. On really warm nights, you can lay a wet sarong over your legs to help you fall asleep.