We went and took the family this year, bought 12 MVMCP tickets, about $1,200. We went at a slower period, Tues, Dec 5, 2017. The MVMCP ticket allowed entry to MK at 4p, and we understood that the park was to close at 6p to the general public. We got our special bands for the party upon arrival, but they were never checked again during the evening.
Come to find out, the band allowed you to go on certain attractions, and get cookies, etc but no one that we know of was asked to leave the park. Even tho it was a low crowd day (4), the park was packed for the early Christmas parade, and I mean utter chaos. I would recommend the Christmas parade, but would never buy a MVMCP ticket, you can attend the parade for the price of regular admission, and buy 7 dozen cookies for the price of the MVMCP ticket.