Did you find a solution, please?
Luggage storage is only available at the Port for ferry passengers
The port allowed us to leave our luggage although we were not ferry passengers in fact they
couldn't have been more helpful gave us free maps and suggested places we should go. Also they didn't charge us for the luggage.
I know this is an old post but just thought I would update it..
Couldn't get info from the port as they were closed at left luggage both times I went to ask.
The train station and airport do not take in luggage either. Nothing in town.