If you have your $200 deposit ready, book WL now. September is always slow at Disney due the kids returning to school. In the past, codes usually came out for that time of year around the $120 plus for standard room at WL. I say book it and wait around for a code then call back and have it applied to the ressie. Worst off, if nothing is available you may have to downgrade but you may be surprised to see that you've saved enough money to go and stay at WL by the time your trip comes around. Good luck and keep your fingers crossed.