There are actually a lot of us up here. Including some of your neighbors in Closter, Hackensack, Carlstadt, etc.
I try to get the locals together every few weeks during the season. I could probably rattle off a dozen or so Bergen/Passiac County guys off the top of my head, and then another dozen or so in Morris & Sussex Counties. We're all over.
If you haven't already, go make an account on NJFBOA.org/forums as well.
The club gets together every month, during the winter months it's usually just something simple like Buffalo Wild Wings or GoKarts, where bringing the FBody out isn't as important. But in the Spring/Summer/Fall, there are plenty of shows, outdoor meets, cruises, cars & coffees, track days, etc to keep your FBody calendar busy. Being February, this month we're meeting up at BWW in Rockaway, NJ for lunch/beers on the 26th. Thread here: http://www.njfboa.org/forums/showthread.php?t=67486
BTW, if you look on the NJFBOA Instagram page, you may even recognize some of the cars & members from your area. I'm in the Wayne area myself, with the blue Firebird in my avatar. Wave if spot me!