I bring a small cooler bag with ice packs and plenty of water and Gatorade. I also bring a couple packs of crackers or snacks and a banana. As a diabetic it is important to keep in balance health wise while in the heat. I also don’t waste more than a few minutes on the range beforehand and during the round I rarely make a practice swing before each shot. Unless it is a difficult lie, I rely on my swing to repeat itself and all those practice swings just add up to additional fatigue and sweat.