If there is availability at POR you might try that. If you can swing it book 2 Preferred rooms, if available. Then you will both at least be guaranteed to be in the same general area. That section has a murphy bed in the room, so you can fit your 5 in that room. Your parents can have the other room.
The doors are on the outside though, not sure if that was something important to you or if others just brought that up as differences, but the resort is very nice and I love the outdoor door feeling at a place like this, fresh air, walks, not at all like a drive up to your door at a roadside inn. Parking is in areas and not at your door, with nice lush walking paths.