There's no real easy way to explain this. In Central Florida, the end of October is generally the beginning of "Fall", at least in terms of our two season -warm, and exceptionally hot. The problem is that the temps fluctuate wildly in Fall and Spring with weather fronts. That said, the first week of October is what most people elsewhere would call the dead of Summer. While most people from more temperate climates may feel the end of October is still like Summer (because it's usually still in the 80's), there's a noticeable cooling off for those of us who live here. As far as crowds, avoid Halloween and Columbus Day crowds, and avoid Epcot (Food & Wine) at night and on the weekends and it's pretty decent.