Congratulations on the new trailer and welcome to the forum.
I really can't help with your question regarding NJ. Sorry.
What does your dealer say about this?
YEARS ago when delivering trailers for Jayco, there was a western state (WY?) that had a width regulation. In the packet of papers, Jayco included an 'over-width' permit for the widest trailers when deliveries passed through that state. As far as I know, that permit was required only for commercial vehicles and they checked at the weigh station. I was never pulled over anywhere for towing a wide trailer that was too wide (or for any other reason
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.