It sounds like a grand villa is the way to go. Or you get the master bedroom of course, the couple with the child gets one of the beds in the second bedroom and one of your other children probably the girl gets the second bed that she can share with the second couples child or I guess it is her niece. The last adult gets the pull out in the living room. If you use OKW you will get two queens in the second bedroom. For me personally there is no way I would do this, I got a grand-villa when all I had was 5 adults and one child. One adult, got one bedroom to himself that had two beds, he also got the bathroom to himself. The other couple with a child got the second bedroom and a bathroom to themselves, and finally my wife and I got the master-bedroom. There is no way I give up the master bedroom to anyone else, I paid for everything including the tickets to the parks. Well the tickets to the parks were free at that time which made the trip less expensive then it would today.