Same here, bananas and 5-hour-power. Lots of water, I drink less gatorade products and more water, all the "sports drinks" seem to be sugar and food coloring. I also carry "cliff-bars" (granola bars), and beef jerky.
Oh, and after doing 5 or 6 games in a day, the more "Boooos!" you hear during the games, the more "Booze" you deserve after. Pendleton Canadian Whiskey, or Glen Livet Single Malt Scotch, nothing erases a fanboy faster.