We're from New Jersey and went during Jersey week in 2012 and it was GREAT!
Now, that was before FP+ and I did a great job planning our schedule, but we loved it. We were able to catch the Food & Wine festival, Mickey's Very Merry Christmas Party & the Osbourne Lights!
We went back 6 weeks later and didn't have nearly as great of a time. It was really hot and crowded with tour groups.
I would go. I don't think all of us from the Garden State make it THAT much more crowded than it would normally be.