I have never taken a ferry with my PC. I think that you gave me a great idea for next year. I checked the Ferry web site for schedules and fees.I'd like to try it out.
When we took the Ferry to Prince Edward Island, my DW got a little nervous when our Truck camper and motorcycle trailer were surrounded by two 18 wheelers. She didn't know (nor did I) that the Ferry carried 18 wheelers and it was one of those rough water days.
PS: To visit Prince Edward Island you only have to pay one way. We paid to come in on the Ferry and left by the "7" mile bridge.