Is there a pattern for UMP's?

[Boardwalk Tigger]

I am trying to plan our vacation and decide which parks we are going in during the day. Haven't decided whether to try UMP's or not since we will be there mainly from Christmas through New Years. Is there a pattern to this like the old Early Entry program? Help!

 

[Boardwalk Tigger]

Sorry, I mean EMP's!

 

[Boardwalk Tigger]

Still got it wrong!! I think it is EMH's.......( I must be getting tired....)