Back before I bought, I rented. First time I started out with two rooms, for two nights each. Then changed to one room for 3 nights (my in-laws were too ill to come with us, and this way we didn't have to move our last night, which was a Friday). I didn't pay a "premium" for the shorter rental period, and the renter was very gracious.
Second time, I rented one night only. I paid $1 more per point than I would have liked, but I felt that since I was looking for a specific resort, and only one night, it was the renters right to ask for more.