They have potatoe chips, crackers and several kinds of candy bars. I'm not really up on what contains gluten, but I think pickings will be slim. You can always go back out to your car and grab something there, if need be. When they check your bags, I dintvthink they would refuse entry if you had a few snacks in a purse or small pack.
Maybe snacks, but all of the lunch items are sandwiches at the tournament.
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