Be sure your toad (and RV) are registered to your EZPass account - even if they have to use the camera to charge you - there is no fine if properly registered.
My RV alone wouldn't scan in NY - worked in other states - they said not to worry - they would find me... lol - and no fine, just the toll.
So far my toad towing has been toll-free.
Now for the tolls near NYC that still have gates in the EZPass lane.... hmmmm..