We will be going Nov 9-23. From what I have read, all but the week of Thanksgiving is a pretty good time to go in November. However, the first 2 weeks are generally the least crowded.
A few things to keep in mind:
If you want to see all of the Christmas goodies the "official" holiday kickoff has in years past began on the third Friday of the month. So no Christmas parade, special fireworks or snow until then.
Veteran's Day is November 11th so try to avoid the weekend close to it.
Small World will most likely be closed until at least late November.
Fireworks and Fantasmic most likely are only on weekends.
You might browse through HydroGuy's sticky thread at the top of the forum to see if he offers more info and tips.