Not sure you a need to do what you are contemplating since if you need more points for a trip next year, you can either bowrrow additional points from your follwoing use year or get a transfer of points before you do the reservation, i.e., that would do the same thing you are cosidering doing.
I am not certain the same rules will apply to transferred points but here are the usual practices followed by MS as to points you own:
If you make a reservation at AKV between 7 and 11 months out (when only owners of a resort can reserve), they will allow you to later replace any points in that reservation with other AKV points (such as newly purchased or newly banked points). If you made the reservation at 7 months or less out, they will allow you to replace any points in the reservaiton with points from any other resort. However, if you made the reservation between 11 and 7 months out, they will allow to replace points in that reservation with points from another resort only if the reservation you already have is separately available at the time you want to make the change.