Can you drive yourself to the island or wetland? Is a ferry boat for people or vehicles, huh?

Can I drive myself to the island or swamp and get off, or are these ferries intended for carrying people rather than vehicles anyway?
Go to Heishaizi Island, you can only take a coach at the service center in China before proceeding to Heishaizi Island.
Go to Heixiashu Island, you can only take a shuttle bus from the service center to Heixiashu China side.