I just updated my website with information about this year's group hotel - Disney's Dolphin Resort. They were able to get the price under $200/night, including tax, parking, resort fee, etc.
The rooms have two oversize double beds (almost queens), and they'll bring in a roll-away (based on availability) without charging the extra $25 per night they usually charge, so these rooms will accommodate a family of 5. They usually charge for over two in a room above a certain age, but they've waived that for our group, too, so the price you see is what you'll be charged - no surprises.
For more info, see http://www.carolinah...travelwdw1.html
If you have any questions, feel free to post here.