Something I posted on another thread, thought it would be applicable...
I know the mere mention of camping scares many people, but I don't mean camping in the traditional "tents and lanterns" kind of camping. We are also a family a five and hotel rooms just aren't made for us at a price we are willing to pay. So, when we come to Disney, we bring two bedrooms, a full bath, a full kitchen, three TVs, and an outdoor patio. The kids bring thier bikes, Fort Wildreness has recently refurbished the pool to add a slide and splash park. The people there have a sense of community so it is an incredibly friendly place to be. The boat ride to MK is short, you can see wishes from the beach... the list goes on.
So, you might try going to a local RV dealer and checking out some of the really cool RVs. If your family seems interested, there are several places that will bring an RV to FW, set it up and you can rent it and the site for about or less than two rooms at a value.
It's something to consider. We love coming back to the site after 6 or so hours in the park and having someplace to unwind, sip and adult beverage while relaxing in the shade. The kids aren't confined to one small area, so those that are tired can take a nap and those who aren't can watch a movie or ride a bike or.... well, whatever they feel like doing.
Frankly, I can't imagine being cooped up in an hotel room with my kids for a vacation, especially when you come to bedtime for the younger ones but maybe not for the oldest or Mom and Dad. And DH loves an afternoon nap in a hammock in the shade.