Firstly: As a pedestrian, you may board up to the last minute before departure. The following only applies to booked vehicles: If you have not changed your booking, only the booked departure time applies. If you are not ready for loading on the pier 15 minutes before the booked departure time, your reservation will be cancelled. In this case, you will only be able to board the ferry when a free ferry berth is available. Many trips are fully booked, especially during the holiday season, so be patient!
Our tip: Let your fellow travellers, especially families with small children, "drive up" on foot with hand luggage. On the islands, you can then continue by bus or taxi to your holiday accommodation or to the beach first!