CP was going to open its reservations for
MVMCP 60 days out. If this is going to change with the new PS poilcies, I have no idea. They were making PS for LTT from 5pm on for MVMCP guests (so I would guess CP would have the same PS times)- you would give your confirmation # at the gate to be admitted to MK, then hang out in a designated spot between the end of your meal/official park opening. (last year this spot was Tomorrowland!). Hope this helps!