Can you bring food into the universal parks

Yes you can sandwiches chips sodas Waters and I would suggest you do bring your own water 1 water is $3.50.

I agree to confirm with the website what you can and can't bring. There are free lockers where you can stash your stuff while you are on certain rides.

Yes, and if in summer it is STRONGLY recommended to carry LOTS of water. Anyway there's almost-airport-style security before even entering the City Walk, there your things will be checked.

Not sure go to the website