Also, don't forget...
If you are booking for one night, you get your room "after 4pm" and have to be out by 10am. You might get lucky and get in early, but you cannot (or are not supposed to) stay late. For one nights points, that could be only 18 hours (or less).
On New Year's Day, you may not want to get up early enough to be out by 10am, especially if you are "ringing in the new year".