Well, I called and they were extremely nice! I have a NJ EZPass, but for some reason it didn't register at that toll booth (but it did for all the others that weekend?). However, my Jeep and plates are new, and weren't in the EZPass system. I never thought to update that with them. So when I called she updated my info, removed the $50 fee, and charged my EZPass account for the $4.90.
Funny thing was that before we left, I joked about how any missed tolls would be charged to my friend bc I borrowed his trailer to tow a dirt bike for the weekend, and the trailer had his plate on it. Ironic that something really did happen... Haha!