This property is very accommodating to Diamond members -- perhaps if you are able to make an international call and speak with someone directly they could prebook you into a room big enough for your family. Especially if it is not a night of full occupancy, they can do it. Since the renovation, all of the rooms seem to have extra sitting/sleeping space, and I'll bet they can find you something. The breakfast buffet is very good here -- have fun at Disneyland!