It's probably worth having the heavy stuff like beer and bottled water handled by the charter company, even if you plan to go shopping for your food.

BTW - we get a box of small bottles of water and refill them from the gallon bottles. We start out by writing people's names on them, but by day 3 it usually turns into a 'free for all.' <img src="http://www.traveltalkonline.com/forums/images/graemlins/dine.gif" alt="" />