I am not sure what you are asking but as far I know you can bring a diaper bag/backpack but expect it and any other purse or bags to be searched before you enter.
Just confirming what the above poster said. I was there a few weeks ago, and the only difference is they do a back check before you enter the park. Saw tons of people with their strollers, baby bags, backpacks, etc., and didn't see anyone having problems. It only takes a few seconds.
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