While I've never been in October, I have been many times, once on Presidents Day and once the week of Memorial day and other times in September and May. This year we are going Oct 12-18 and we are expecting to encounter some crowds. However, we KNOW the parks will NOT reach capacity or anything close to it during this time. During moderate times, the lines are VERY manageable if you go early or if you use FastPass. My guess would be that its reasonable to expect 40-50 min standby waits for the biggies during the busy times of the day and 1-2 hr average fastpass returns. Even in "slow" times at WDW, there are still moments of feeling crowded, so keep in mind WDW is a busy and FUN place to be!!!! A secluded beach? A cabin in the woods? NO crowds, and not much fun IMHO- so WDW here we come! If you are a crowd-o-phobe, be glad you are missing the busiest times of year and TOUR EARLY!!