Yes.
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Yes. They do a bag check there also.
Yes. It is allowed to enter with backpacks. However, to access the park, you will go through the metal detector.
Yes just no weapons of any kind, alcohol, glass, or hard coolers and x-ray machines are used
Yes. You will have to go through a metal detector and security check on your way in to Universal City Walk, but you can take one in.
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