We've been numerous times in Oct, the weekend of Columbus Day and a couple days leading up to it. Last time was 2014, the holiday was very busy, it was our last day and we only got on a couple rides. The Wednesday before was great, a bit busier on Thurs but still not horrible, then quite busy over the weekend. During that time DL opened at 8am except Tues and Thurs it was 9am and closed at 6/7 on party nights, midnight on Sat and Sun, 9 on Tues and 11 on Thurs. Basically the hours were all over the place lol. With so many events happening in Oct and school breaks I'd definitely do research on the dates you choose so you have an idea of what to expect with crowds. I'd say all the weekends will be quite busy but if you go in knowing that then I think it's very manageable.