From their site......Large hard or soft coolers, glass containers, food, drinks and picnic lunches may not be taken into the park. Guests with special diets, baby formula or baby food may bring their items into the park............... so if you are just planning to bring lunch in they won't let you. You can exit the park and eat a picnic lunch in an area near the parking area, though. We usually carry in 1 bottle of water and they do not make us leave it at the gate. BTW carry as little as you can in your pockets. You do have to remove everything from pockets to go through the metal screener which is at each turnstyle. You may also have a picture taken of you taken when they scan your AP if it does not have a picture on it like the old one I have does.