Key West is AWESOME in November for flats fishing! I hope it happens for you, you'll come back with dreams of Margaritaville in your head that will never really fade from your mind. The mangroves, coral sands, blue waters and the whole package is simply narcotic.
I can recommend a few people to you, for starters:
Ben Ianotta Jr, author of Memories of the Miramichi
. Ben is a guide in Key West.
Bill Corrigan, who works at Nauset Angler right now but will be returning to Florida in November where he hails from.
There are many, many flyshops from Key Largo to Key West - I recommend talking to Bonefish Bob, Worldwide Angler in Islamorada, Jeff Cardenas who I believe still owns that beautiful flyshop right in Key West for starters.
And don't forget to try the yellowtail snapper, conch chowder and key lime pie with a margarita while you're there!
Keep us informed... and ask any questions you have; anyone here with Key's knowledge will help you out I'm sure.