We went last year on Ocotber 17 for a week it was awesome! It was slightly cooler than we would have liked but we were still in shorts and t shirts! Crowds were low everywhere even at epcot where the food and wine festival was going on! (seemingly the weekends are very busy though with locals!) If you like food and you like alcohol its a must, you can get a food and wine passport to! And it is kid freindly to, we didnt see anyone causing trouble due to alcohol!
Magic kingdom had started the Mickeys Halloween party which was awesome but costs extra to go and operates on select nights. Were more or less going the same time this year and i realised that because of the halloween party MK closes early quite a lot of the time (7pm) so if you want to see the fireworks pick a day it doesnt close at 7! The party was fun but i think we will just do it every like 5 years or something!
Animal Kingdom was pretty empty we finally got to see festival of the lion king without having to queue for like an hour! And now that i have seen it i probs would queue for an hour it was amazing (and we were just two adults!).
DHS well, i can never really tell crowd levels their it just seemed the same!
Theres also The PGA golf thing on if you like golf (i just realised this not that long ago even seeing it last year never clicked it happened every year at WDW so we couldnt get into our preffered hotel!).
All in all i would say the start of October is an awesome time to go it was very quiet! Hope that helps! :wave: