The passengers boarded the ferry at 9am and didn't get off until 8pm.
The ship has no permission to dock.
Australia's Health Minister says we've been doing a "tremendous" job.
Police and aviation staff found nothing of concern.
Heavy traffic and long delays are expected.
More to come.
Travel restrictions mean many Kiwis are trying camping for the first time this year.
Ahead of a travel bubble with New Zealand, many tourism workers are unsure if they want to return to their old jobs.
The vast majority of Kiwis are apparently keen on working while on holiday.