While we were on Norfolk Island we were lucky enough to watch a ship unload.
As the seas are too rough for a ship to come into port, lighters or barges are used.
https://www.flickr.com/photos/blackdiamondimages/8862126084 shows one such lighter in action.
Cars, buses refrigerators, food etc are all unloaded this way.
My layout shows two photos of this happening. The first is the ship with lighters and the second is the goods stacked on the wharf.
My journaling says basically what I have just described.
I also used some twine and a diagonal hatched card to give it a wharf feel.