I read on wdwmagic.com that Mission: Space is going to have the AP Holders' Preview days on August 1-3. Having been informed that Sundays are the least crowded days at Epcot, I was planning on going to Epcot on August 3. How big an event is the AP preview going to be? Should I change my Epcot day to another day? I am reluctant because I have a PSB PS on that day at 10:20 am. I would appreciate your expert opinion. Thanks in advance. -Yoko