The infamous "Jersey Week" this year is roughly about Sunday November 5th to Sunday November 12th. The busiest days will probably be Thursday November 9th, Friday November 10th, and Saturday November 11th. Crowds will start mellowing out considerably on Sunday November 12th. The Friday and Saturday will be VERY crowded.
The other reason for crowds (besides the Jerseyans) is that many states have days off from school that week, and many kids have a three day weekend. It will be busy, especially at the end of the week!

But even so, with normal park planning, we are going and intend to have a great time!