Bringing home my puppy from a ferry ride

Hello everyone!

I'm getting my new puppy in two weeks, but he lives in Nanaimo, BC, which is 1.5 hour ferry-ride away from our home terminal (Horseshoe Bay, BC). We will be travelling as foot passengers (i.e. not bringing a vehicle with us). The ferry has a designated pet zone area, which is a small room for pets onboard. We are planning on bringing a crate with us, where we will keep him inside, while we sit in the pet zone since pets are not allowed inside the ferry. I read online that we're not really supposed to bring dogs outside until they get their second-round of vaccine shots, but I feel bad for the little guy if he's stuck in his crate the whole ferry ride. Would it be okay to let him roam in the pet zone here and there, or should I just keep him in his crate the entire time? I was planning on giving him little breaks outside of the crate (maybe 10-15 minutes out, then place him back inside the crate). I'm also worried that placing him in his crate will confuse him later with his crate training. I was thinking that we could use the onboard kennels, so that he won't have negative feelings towards his actual crate.

Thank you for reading~