I agree going light with no bp, is the better approach. Eating at all the restaurants is really part of the experience and you shouldn't miss that for a granola bar in your BP. You can carry a bottle of water and re-fill it at spots to save some money, but other than that I would recommend eating at the park spots, plus the restaurants at Universal and IOA are all great!!! Not your typical theme park food at all. Don't miss it! Mythos, Enchanted Tavern, Seafood restaurants at the old park, and Jimmy Buffets are all terrific food!