Having gone cross country several time both in a vehicle and with the MH, I feel your Pain!!! I do try to avoid Toll roads when possible but at times the options add so many extra miles and time to a trip. You sometimes have to weight the benefits to one or the other.
My main thought when seeing this post was the cost involved in crossing the George Washington Bridge in NY with my MH and Toad. It's been a few years but it was in the range of 100.00+ !!! Not so bad until your are practically thrown out of your seat from the lack of maintenance(ruts, potholes etc etc) of the roadways. I still to this day, call it the worst road we were on in the 7000+ mile trip we were on.
Anyways....Have a Great trip!!