You can always call and book your home resort 11 months in advance of your desired check-in date subject to availability. You can book a maximum of 7 nights if you call right when the 11 month window opens.
You have 2 options:
1) Book 7 nights when the 11 month window opens, then call back on the next 2 days to extend by one night on each call.
2) Wait 2 days past the opening of the 11 month window, then you can book all 9 nights at once.
Which option you use depends on if you are after a booking category that books out fast or not.
You can book your initial 7 nights online starting at 8am eastern time on the day your 11-month window opens. You cannot modify that reservation online so you will have to call MS to add those last two nights. If you can risk waiting until the third night of your stay is 11 months out, you can book all 9 nights online.