You can do this, depeding on what you have booked now. We all have the 7 for 5 package, plus 1 additional night at rack rate on our package. I called to apply the room only rate to the final night, but was told that they would have to cancel the first ressie, and issue a new one for the package, and then a second one for the 1 night. We were also told we would most likely have to switch rooms on that final night. We have too many kids and too much stuff to want to switch, so we just stuck with the rack rate!