We went last year, pretty much every weekend and never had a problem with crowds...it was actually a lot less busy than most other months. Late October and Early November is our favorite time of year. The weather wasn't bad, but if you live in Florida mid-80's are cool...the humidity doesn't seem quite as bad and there is more of a breeze...I'd recommend early October, we were surprised with how empty some of the parks were...like MK and Epcot...
As for the food, we loved walking through and checking out what each country had. Prices range from 3 to 6 dollars for a small portion, but the ability to try what you like or what you may never try was fantastic...got me hooked on sushi in Japan!
We especially enjoyed the beer around the world tents..although we missed the free beer class....I'm still sad about that!!
Check into the classes, I've heard they are wonderful and some of them free.
I would recommend this time of year probably over any other if you are adverse to the heat, but beware that one day can be unseasonably warm and the next cool enough to wear a jacket...
If you decide to go, I hope you have a great time!! We always do!!