Goofyfamily,
If you have booked a cruise already using
DVC points through Member Services, in order to "upgrade" you will actually need to cancel your existing ressie, then make a new one in the category available. That will incur an additional $75 fee to make the change.
If you have booked a cruise on cash, you will not be able to "combine" it with points to upgrade. Again, you would have to cancel that ressie with
DCL or the
Travel Agent you used, then book a new ressie with MS. Good luck!
