Be at the dock in plenty of time.

Try to limit your stuff.

Wait for passengers to get off before loading.

Check in on the mate's clipboard.

Wear a shirt and shoes.

Leash your dog.

Check for wildlife along the way.

Ask the mate if there is room for your oversized object.

Move your luggage and carts out of the way of people trying to load the next ferry.

Call ahead for a return pickup and tell the mate how many passengers and luggage carts you need.

Stay seated when the captain is docking.

Try to remain flexible: the crew is doing the best they can in the interest of your safety.