Hi there, Mark!
Disney's All-Star Music Resort offers one excellent option for a traveling party of five: the Family Suites. These Suites can accommodate up to six Guests each. They do cost a bit more than the standard rooms, but you might appreciate the space.
In order to maintain Guest comfort and safety, Disney does adhere to the occupancy limits placed on rooms by fire marshals. If a Guest breaks the fire code by having more people in the room than occupancy permits Disney does reserve the right to cancel that reservation.
Depending upon the time of year you are going, I'd urge you to look into the five-person rooms at both
Port Orleans Riverside and the
Cabins at Fort Wilderness; these two Resorts, both in the Moderate class, can accommodate five people (the Cabins will sleep up to six Guests). The price difference between these Moderate Resorts and the the Family Suite in the Value Resort might not be terribly broad.
Let me know if I can be of further assistance!
See you later, celebrator,
-Deborah B.