We've been a few times that time of year. The weather is variable, but generally warm, and fairly dry. One year we caught the tail end of a hurricane, which meant it was windy and cloudy for a few days, last year there were record high temps, but record highs in early Nov are really nice, so don't expect mid 90's!
Crowds generally aren't too bad - last year they were pretty light, the time before much busier. I think in general it's not too crowded a time.
All in all a great time of year to go, I guess the only consideration might be there's a chance of cooler weather (and as any time in the hurricane season, the small chance of catching some tropical weather).