I put this under class A as I believe those driving Motorhomes ( especially longer heavier w/tag axles) would be paying much higher tolls than fifth wheels or travel trailers, and perhaps more likely ...
We went from Tn to Plymouth Rock in Mass and back over to Michigan this October. We left the Mh at home. Even so we have toll slips of about 200.00, wife said. We used the Pa Turnpike and 90/80 too. Maybe another one or two. We plan on going back with Mh to the Mayflower Association for some family research this year taking the Mh. We will have to spend some time to make out a travel plan to miss all the Turnpikes and the Roads in Rhode Island that nearly bet us to death.