In response for information with concerns for safety and room, I am posting these photos of said information. We felt completely safe while traveling the ferries, it is a wonderful experience! Would do it again in a heartbeat. Here are a couple of web sites with information about the Kennicott ferry/ship, you can google lots more:
They are not the best quality, but I took them for my own personal use. I was not intending to post them to the web, as you can see. But they do serve the purpose.