We had a Poly trip booked for Dec (value season) when we decided to do DVC. Since we were able to get the '05 UY pts banked into '06, we just rebooked using points, with plenty of points left over to do a Sun-Thurs trip next June.
To give you an idea of the point differential, a Sat-Tues trip is 173 pts for Poly, while it would be 101 for SSR.