great time of the year to go.....slow all month, BUT the MK will still be crowded on Sat, plus in OCT they run Mickeys not so scary halloween parties, so make sure you take advantage of that, it provides great access to all the pest rides at the MK, without the crowds. It sells out fast, so buy it in advance.
just DONT go to MK on sat, and you will not experance crowds at all.....
in Fact NEVER EVER go to the MK on a SAT anytime of the year. It is almost twice as busy then mid week during the off season, and its the busiest day of the week during the season. Mondays are the next busiest. Then sundays and fridays.