The Food and Wine Festival is so worth it. You still get regular season at the Deluxes. I would even consider downgrading to a value resort because there are value rates until November 16. You can have meals at Jiko and Bomas, if you want to visit the AKL and take in the atmosphere that way.
Also, if you go to a value resort you will save enough to go to the best restaurants, buy more souvenirs, etc.
I think November is less crowded, too except for the Holiday time. Even if hours are shorter you accomplish more in November.