Lots of stuff that's good for low-carb/keto. Keto bread, bagels (though the modified food starch they use still can spike BG levels), some keto-friendly desserts/snacks/crackers, lots of cheeses, meat sticks/jerky, and, of course, meat and vegetables suitable for low-carbing. Bring a quarter with you to rent a. cart (you get it back at the end) and your own bags (or you'll have to buy some or scrounge an empty box).