You may take food that doesn't require heating up. Snacks and water. https://www.universalorlando.com/web/en/us/plan-your-visit/hours-information/policies-restrictions. Check out the link if you have anymore questions
Yes. I seen a few people with coolers on there
Very small coolers and snacks are allowed
Yes, they don't care
Outside food is not allowed I guess but you can out in your bag pack and carry. Cooler is allowed. However, at lockers you shall have dryers.
Thanks! Your answer is awaiting moderation.