601, you mean there is a little man who comes out to check your insurance? I’m intrigued. In 63.years of sailing no one has ever asked for my certificate of insurance unless I was booking a berth. Most Marinas I have visited both interstate and overseas (italy, croatia, UK) have a public wharf section with space for a few hours parking and also a “ dinghy dock”. At most someone will take your lines and charge you a few Euro.
P . S. your boat doesn’t have a toilet?