Dave,
Most of the people on this board will suggest that you that renting a condo/townhome/villa will be the best route for 7 people. It is certainly the most cost effective if you want more space than two hotel rooms will provide.
You can rent a 3 bedroom /3 bath townhome in the Windsor Hills resort (WH) for around $115 per night depending upon the time of year that you travel. That's much less than two rooms at the Comfort Inn or LaQuinta, and Windsor Hills is a very nice resort by all reports. The resort is a 5 minute drive to Animal Kingdom.
There are lots of other rental communities in the Formosa Gardens area as well that offer condos and villas with a private pool. If you are interested in some ideas, post back what you'd like to have, and a general budget you have for accommodations, and people will be happy to offer you some ideas. (We're renting a 7 bedroom / 6 bath home - over 4k sq feet for less than $400 per night in November. We have 9 adults traveling.)
Keep in mind that if you rent a villa or townhome, you wont' have daily maid service or access to food via room service. But you will get a lot of space for the money, with a kitchen, a living room, and most have in unit washer/dryers. Another advantage of a town home (at WH) or a villa is that you have a pool right at your unit. This is really nice if you have kids - no need to hike to community pool. Just walk out your back door.
If you want a more hotel like atmosphere, try the 2 bedroom units at Caribe Royale. They will s
Good luck!