Try to get a cash night either through MS (full price, though, probably no discount available) or through CRO (again full price). If you get through MS, it will be easy to link your three stays so you don't have to move. If you book through CRO, make sure your point stay reservations have the reservation for the CRO cash night on them and vice versa.
If you can't get a cash reservation for that one night at BWV, get one for somewhere, otherwise, you will be sleeping the car that night.