Good luck, what do you use when you ride normally?
Bottle or camelbak? Do what you are comfortable with, then there is less stress on you. I cut the gatoraide in half with water, less irritating on the stomach.
Make sure you have a multitool, pump, tube patch kit, and then you are prepared when nothing goes wrong, Murphy's Law applies as always. If its going to be wet, carry a secong pair of gloves in the back of your shorts, if you spill and put your hands in the muck, you at least have clean dry gloves so you can hang on and sprint back into position.
Oh, and eat at least two hours before, so you arent stuffed too much.