Points need to be effective on the date of the stay, not when you make the reservation. For example, I have an April use year, which means my points for 2003 are effective from April 1,2003 to March 31, 2004. So for a May 2003 stay I would use 2003 points and could book them next month for my home resort. No need to borrow since the stay is within the 2003 use year, I could even borrow 2004 points. I would need to borrow 2003 points if I wanted to use 2003 points before an April 1, 2003 stay. Again, the points are effective on the date of the stay, not on the date you make the reservation.