How do you guys tag a narrow (single lane) way with v. bad rutted, steep dirt surface that certainly requires an offroad vehicle and can be impassible at times of the year - that connect a small, isolated hamlet/village?
Looking at it, I’d not call it anything better than a track, basically as it’s rough + narrow. Does the fact that it connects to a small settlement make it a minor road (Unclassified) regardless?
If it’s a road, connecting a village to some other tertiary or higher classified roads, I would use unclassified.
If it’s a bad road, just to have any connection to and from a village I would use highway=service.
If it’s even not passable for foreigners (like you described) without having problems, I would use the highway=track and an appropriate tracktype.
For the first 2 cases I would also suggest the use of surface and smoothness tags.
The Australian tagging guidelines do not suggest unclassified for rough tracks. I would use unclassified only for maintained (made) roads. I think you have a track.