Thanks everyone for your opinions!
I went to the bookstore this weekend and I think I will buy the PassPorter (I really like the fold out maps of the parks) for some of my guests and Birnbaums for the others. Probably will buy a few of the kids editions too.
dotterson....hmmm I guess it wouldn't hurt to ask them. The authors got married at WDW I think!
I have already thought about ordering the planning DVDs and videos for each family. I love watching them!