I think the comparison here would probably be the Greek archipelago. Or indeed Greece, or even more broadly the Balkans, given how the settlements are mostly in valleys and there's a lot of mountains, but I wrote the next paragraph before thinking of that:

You can go into the absolute wilderness of the states/the waters of the Mediterranean with suitable gear, and there's some dotted isolated communities within the uninhabited territory/EEZ of the greater region.

I don't know if either has good cell coverage. I presume not, given I managed to lose cell coverage even just crossing the English Channel by ferry a few years back.