Here's a word of warning...if you print it out directly from your computer, like the photoprize.html file from your c:drive, there's a good chance they won't let you have the free photo. It can't hurt to ask, but that's what happened to us over Easter.
I won the game, but like lots of others couldn't get the file to open right. I was able to search my computer for the file, open it fine, and print it. But when I took it to Guest Relations, a manager came out and said it was "fishy" because it should say "page 1 of 1" at the top right, instead of the "c:/programfiles/blahblahblah" I explained that I use firefox and it wouldn't print right, so I had to go in and manually make it print, and they said that that made it invalid and they completely refused to give me the free voucher. They were really nice, and we spent probably 15 mintues going around and around, before I finally gave up. It just wasn't worth ruining my day over.
I'm just hoping I am an isolated event, and everyone else doesn't have any trouble. But just don't be surprised, just in case they say no. I don't want anyone else to be as disappointed as I was.