For 5 people, you can check out POR, CBR(keep an eye on construction) , Cabins in Ft. Wilderness, or ASMu Family Suites. The first two have some rooms with 2 queens and a pull down bed that will fit a child/ smaller person. The cabins can sleep 6, and have a bedroom w/queen, bunk beds, and sleeper sofa. The Suite also has room for 6, w/queen in bedroom, sleeper sofa and chair and ottoman, as well as extra bathroom and kitchenette. Rooms are cheaper, just depends on age/size of your family members and how much space you need. There are also Family Suites at AoA, but they are more expensive.
You can check out Mousesavers.com for rates for the time of year you are considering, and description of rooms. Also check the threads on here for each resort to see pics and get more info.