We did 'Jersey Week' 2 yrs ago. The crowds were nothing like summer, but not as good as Sept or 1st week of Dec. either. I would say they are truely tolerable. You'll wait for the usual (get Fastpass) Pooh, Dumbo, Peter Pan, but Snow White should be a walk-on, Test Track (single or Fastpass line), Mission space, Imagination, and most other rides should be @ 15 min. wait. Your best bet is to avoid, or leave very early on the "early entry"parks. I.e. Sun. is MK early entry..if you go at 8 am, be prepared to leave @10 am for another park, or your wait will be ungodly. And EVERYONE, I mean EVERYONE you meet while at the parks will be from surrounding towns in NJ. I even ran into a business associate whom I do not care for much that week!!
You WILL need priority seatings for meals, so make them quick, if you haven't already.. Last time we were there, we were hungry at Epcot//We went to the Coral Reef and asked for a table for 3 (@6 pm) The hostess asked if we had priority seating, we said no. She said her next available table was for DECEMBER!!!!! Good luck, and let us knoiw how it goes--I'll be going Jersey Week next year..