You can book at one year out. So, they are taking reservations through October 2014 right now.
Also, generally, they book up fast for the last 2 weeks of December, and around Thanksgiving week. Check this year's pattern on the SOG website, and you will see what has already been booked, and what is still open. I would assume that pattern is generally what next year's will look like. So you can decide when you want to book.
I would try at the end of November or early December this year, to reserve for Nov/Dec 2014.