Can you bring a backpack?

Yes, you can. As long as you let them search through it

Yes

Jazmine and Heather are right.

Yes you can. They also have lockers there for a decent price so you dont have to carry everything around. But i do suggest bringing one small backpack to hold money, phones, sunscreen & other things youll need throughout the day. My boyfriend left everything in the locker so whenever we wanted to buy a water or anything we had to walk back to the locker. So bring a little backpack with you around the park while youre change of clothes & stuff is back in the locker. Have fun 🤗

Yes. They will ask you to open it at one of the checkpoints and they will look inside while you pass through the metal detector. Good security measure.