Sorry about being late answering your question but i was on golf course yes I do tow a vehicle behind my motoehome. It registers as 4 axels and cost a couple of bucks more than if we were to run thru seperately but who wants to stop and unhock.....i just run thru the wide truck lane and the toll meter just turns green and i drive thru.
I also have the account set on automatic renewal and every time the balance gets down to $20 it increases by the amount I set which is $ 75 because I go over the Chesepeake bridge quite often