If it's that far in advance give them a call. You will gave to pay rack rate, but just keep checking. If the rate goes down just call to have the switch.
i have booked one year out and last year booked december for the october '12 stay.
a few times i book with the AAA rates when available then switch when promos come out.
or ap rates come out.
some of the promos are listed for 13 months.
that was the case last year when i booked for rph.
if you want to secure a particular room type and tower over a year i advance, call and book rate.
switch when rates are available.
As others mentioned if you want it now ,you have to call.If you want to wait until it is online, I booked my Jan 2012 trip ,end of July 2011 was when it became available on the website
I just tried to call for February 2013 and I was told that they didn't have the ability to book for 2013 yet...I would need to call back in a few months.