Sorry - but I couldn't find anything in the FAQ about this. I was wondering what were the rules again if you buy a hopper ticket, and then later want to upgrade it to an AP? We haven't done that in years, because we were always renewing our AP's. But we let our AP's go in 2006 because we knew we wouldn't be back for a while. I am planning a four day trip, and wanted to know when we needed to decide on upgrading to an AP, if we do at all. It used to be the first day you used your ticket, you had until you left the park to pay for an upgrade. But what if you don't decide then, and it's on your 3rd or 4th day that you decide, 'Hey let's do this more often'. Will they still let you upgrade? And of the wackiest part of this question - which is I think is a no. Can you upgrade a ticket that you used say a few weeks ago? If so, would they backdate it? I would think it would be a simple matter of managing the database, but i really doubt they let you have visitors remorse. My aunt was curious about this one because now she wants an AP.