Can you bring in a gallon of water?

I sure

A camelbak will probably serve you better depending on how long you are there.

Yes you can and I highly recommend it...lines are as long as the rides lines just to get a refill

Maybe like one of those big aquafina bottles, but they don't refill em' they only give you like two cups of ice water at a time at the concession stands, water fountains were turned off when i went...

U kan bring it in

I'm not sure if they will allow a gallon. I took in 2 water bottles