I am also a huge fan of the Passporter. It has good information on all the things you need to know and then the best part - a way to organize all your stuff!
There are special organizer pockets for each day of your trip and one for your resort. This lets you keep all your info for the day written on the outside, reciepts, tickets, conformations and stuff on the inside. Fill in your impressions each day and you also have a wonderful reminder of what you did each day and how much you liked it. As I say, I am a big fan. I think they are well worth the money. I now have my fourth one - one for each of the last 3 years and the one for this year. Have fun whatever you decide!