Thank you for the advice golfgal, I will definitely check out Small World Vacations. We are going to be very recent college graduates (the day before the trip!), so we need to get the best deal, and I would hate to book, then see a great discount.
AKL is beautiful! I was there for dinner once, and it seemed like a really great resort. Your children would love to see all of the animals! The Polynesian and POR also accomodate up to five people (at POR you can add a trundle bed), but AKL seems like it would be an excellent place to stay.