I feel that if you're going to put in a tournament and not allow outside food or drinks, you better have an efficient and well stocked concession stand. Theirs are neither efficient nor well stocked. But at least they're not being strict about the outside stuff. They aren't even really checking. DH had one large and one XL water cooler in the wagon today and they just scanned his pass and didn't even look in the wagon. If we weren't already sneaky types it would be pretty bad though.
Or at least vending machines for drinks and ice. That sounds crazy. In a situation like that, I'd even be willing to pay a small fee to bring my own cooler in. If you can't handle the demand, get rid of the rule!