Does anyone know if you can bring a "hard" Igloo type cooler into the parks? We are going in October and my sister and her family are joining us. My newphew has really bad food allergies (milk, eggs, and wheat). My sister was wondering if she could bring in a few staples that she won't be able to get in the parks, like his butter, that would need to be refridgerated. She's not too worried about full meals. We will plan ahead and call each restuarant to talk to the chef. Disney is so great about special dietary needs. Just wondering if we could bring in a few of the little things.