One of the special parts of a vacation to the happiest place on earth is the accommodations. The Walt Disney World complex hosts a variety of hotels but I've always been partial to the original three. Settled on the shores of the Seven Seas Lagoon are the Contemporary Hotel, The Polynesian, and added many years later, the Grand Floridian.
Ranging from $299 - around $1400 a night, the prices are a little steep for many, but there are benefits. Many families come to town wishing to eliminate driving around an unfamiliar place, Vacations are supposed to be fun and once on Disney property everything you need for your vacation is available along with world-class service. There is transportation, scenery, and the ambiance of staying in the "Mouse House" for the entire vacation. After a day at any of the parks or water parks, weary travelers can't imagine having to drive off property to secure some sleep. All the hotels have comforts such as movies, swimming areas, jet skis, sailing, luaus, (at the Polynesian), etc. The monorail actually runs right through the center of the Contemporary Hotel. There are numerous activities for the kids like you might find on cruise ships, character dining, and much more.
Vacation packages can be booked on-line. I recommend these since the prices are considerably higher than off site, but shop around. Also consider military and AAA Club discounts.
Check with your employers as many corporations have deals with the theme parks for family discounts.
The only down side of staying on property is the premium price tag that goes with the convenience. Rooms are luxurious but basic. Last time I stayed in the Polynesian there wasn't even a coffee maker in the room. The whole design, while plush, is set to make you go out of your room and not sleep in. (Unless you're the fortunate one who can afford the luxury suites).
Sound like I'm trying to discourage you? Not at all. The Disney folks run shuttles from Orlando International Airport so you can save hundreds on rental cars and fuel. Mom and Dad can be chauffeured everywhere and not touch a gas pedal. Not to mention you can bee at any of the parks within minutes of waking up! So, I would see what offers you can get from Disney.go.com, Travelocity, or the other sites.