If you're going in just 9 days, prepare yourself that it may be booked up. I waited a little long to book ours for October and only had one choice of day/time for the entire week we are there -- and this was almost a month ago! They do fill up fast, but September is a typically less crowded time, so you may be in luck.
Also, fyi, if you are a DVC member or AP holder you can get a nice discount (15 or 20% iirc).