The car ferry. Walk-on passengers have to wait out in the weather until last, and the whole thing looked rather scary and rusted, but it got us there and back...... phew.
A bit different to the ferries we got used to in the US.

There are also passenger ferries and water taxis, but this was the cheapest options ($11 as walk on passenger - $140 with a car!!!!) for the 50 minute ride.