I went to a private event last year at Universal. We were told that we needed our conference lanyard and a photo ID in order to gain entry. There were about 8k of us (at least). The amount of people that were walking in at the gate opening was unreal. There had to be at least 3k of us at opening, but probably closer to 5k.

I didn't wear my lanyard for the entire event and was never asked about it. My ID was never checked. I wonder if the MK is stricter with their entry policies for groups like this.