I would recommend bringing it. When I just went yesterday they didn't check mine upon entry and only scanned tickets. I went to the entrance by Blue Men Group because we stayed at one of the Universal hotels. So I don't know if you definitely need it for the normal entrance but if you are planning on purchasing any alcohol you definitely need it because Universal is very strict about the photo id to get alchohol. Just for entry though I personally didn't see anyone need their photo id but they could still ask for it.
I would think so because you need it to get into the park on a regular day.
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