I have spinal stenosis------is there an elevator from where the cars are parked up to the above decks?

Some of larger boats do. Find out which ones. Cpanynis very helpful when you call

The larger boats like the Susan Ann the Mary Ellen and the MV John Henry all do...

Ferry does have an elevator, when you pay for your tickets let them know you need elevator and someone will guide you where to go

No

Nope. However,they may let you stay in the car. Call first.