Time to think out of the box. You have been asking questions to get different views so here are some things I thought of but I can not be specific about your particular location.
This is not out of the box thinking. I know here in St. Aug. anchoring
downtown and paying for the dingy dock
showering at the City Marina. Yes, a mooring
field is coming. When, I do not know. Parking is free from 6 P.M.(?) to about 7 A.M. Anchoring
Run, the parking is free. No showers are available but what about a salt water shower
onboard? Have you checked out all the coves in the area?
I know when I took my motorcycle trips, my wife could only take a 2 week vacation
even though she was entitled to 3 weeks. It took me a long time to come up with the idea to fly her into the area in which we wanted to sight see. She flew into and out of Bangor, Maine
when we cycled around Nova Scotia
. I know there is a National Park around Bar Harbour. I think there are camping facilities. She spent 10 days on the back of the motorcycle. We did the same type of thing when we visited Las Vegas and the Grand Canyon. She fly into Phoenix and out of Alberque, New Mexico
.Flying in and out of different locations was a big leap for us. We could of just decided not to do the trip. It would have been a whole lot easier.
Have you PM LinnetWoods? She is floating around the Med. I saw a couple of her posts. Keep thinking about your goal. You and your wife will come up with a solution.