The Gatroade/Pedialyte debate differs from what all of you were taught in middle school. Every time you walk past a water fountain, take a good long drink. Water is free; contrary to what sensationalistic media says, you CANNOT drink too much of it; and no one has an aversion to the flavor of it. Water is good stuff, can't go wrong with it in my opinion.
So, what should you do? Well, I would keep it simple. Drink plenty of water, at least three Nalgene bottles a day. Start drinking plenty of fluids now, as your body needs time to get totally hydrated. After practice, drink some type of electrolyte replacement drink. Stay away from empty calories (soda, coffee) that can dehydrate you. And make sure your pee is clear. The clearer the better! You need to stay hydrated, at all times, for optimal performance in training and in racing.