That's a pretty good rate for October, which is a busy month for all the Epcot area resorts, due to the proximity to the Food & Wine Festival. I would definitely book that rate, but check back periodically to see if any new promotions or discounts have been released. Definitely check again in the six weeks prior to your trip, because that's when the Starwood Starpicks rates are released, and those rates are often the lowest you'll ever see.
Speaking of Starwood, if you haven't already done so, you should joint the Starwood Preferred Guest program, so you'll earn points for your stay, which can be used for free nights and upgrades on future visits. If you enroll through AAA, you will automatically receive Preferred Guest Plus status, which will allow you to upgrade to an enhanced room at check-in (based on availability).
Signing up for S/D emails and following the S/D on Facebook will also keep you up-to-date on current promotions.
PS - October is a great month to visit...we'll be there, too. What are your dates?