Grammy, I am one of those vile Jersey-ites who makes the treck every year.
"Jersey week" is the week of election day, and schools are almost always closed the Thursday and Friday after election day due to a teacher's convention.
Many schools are closed other days that week as well (ours is closed the whole week). That year it will be 11/3 to 11/10 (If you go Sat to Sat).
The crowds for the most part of manageable. They are noticably heavier that Thursday than they will be the Monday before. They are also very light the Monday after. The last few years it has coincided with the "Super Soap" weekend, as well as the end of the F&W Festival. These events themselves bring lots of people. However, if you go during holiday time, I think you will find "Jersey Week" crowds to be quite manageable.
I have not had any problems myself making reservations at my home resort that week.
As a bonus, the weather is great!