So... Prowler, part 2.
I got to Avonmore, investigated the Winton house, found the missing person, couldn't open the door and so went back home because it was getting late. Nerxt day I intended to return to Avonmore to see if I could figure out the door, but dropped in on Ms. Winton on the way. When I got to the ferry the option to travel to Avonmore had disappeared.
Is that the intended behavior? I know from re-doing the quest that the other location on the island has a clue to the door code, but it was a bit surprising to be able to shut the quest down when it was barely started.
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Also, a hostel/bed & breakfast place would be useful at that end of the map. Or is this where camping gear comes into play?