Alot of people assume the holidays will be super busy & avoid the parks accordingly, but it’s probably more likely little things. Like blocking off duty CMs from coming in.
When we went for the 60th, the day of was certainly crowded, but not as bad as other days we were there that week. I met an off duty CM waiting for the monorail that night. She said they had been banned from the parks that day to help keep crowds down. The only reason she was allowed in was because she was using her identical twins AP.