You can always reserve up to 11 months in advance at home resort and 7 at others and thus you can call to reserve at home resort in Jan 09 for Dec 09 trip. Which use year's points apply is always determined by when you will be there not by when you call to reserve. For a Dec 09 trip, your "current" use year points will be those issued Dec 1, 2009; if you have Dec 08 points and want to use them for that trip, you would need to bank those; if you wanted to borrow points for that trip, you would be borrowing from use year that begins Dec 2010.