My sister lived in Wingellina[1][2], Western Australia which was a 6 hour drive on unpaved, 4WD required track from Alice Springs. That's close to one of the most difficult, isolated places to get to in Australia, but even there isn't a week on Camels. Maybe going further west into the Great Sandy Desert might get close (although you get close to small townships in WA if you go too far).

The Empty Quarter has low population density but is smaller than isolated areas in Australia.

There are probably places in Siberia and Canada that are fairly isolated too.

I agree that there are more isolated islands. The Pitcairn Islands is the most obvious case.

[1] https://maps.app.goo.gl/Q2wL9KCa9aXht3YS9

[2] https://en.wikipedia.org/wiki/Wingellina,_Western_Australia

But a good example of remote is Nulato, Alaska.

I can leave Denver and be DEEP into Wyoming in 2 hours, or it can take 90 minutes to go 60 miles in Rural Virginia (80mph speed limit vs 60 mph speed limit)

Some people just love not having people around, in which case you really want low average weekly population density within say 5-10km (out of easy visibility and hearing).

Some people are concerned about civilization collapse or civil war or... something (ie, the prepper type). In that case you can imagine population dispersing away from (and possibly towards) major population centers over a period of months, and you want true isolation.

I know you didn’t mean Low Earth Orbit agency, but the thought is funny.

If you’re not more than 1000+ km from the nearest satellite, you’re not in a remote area!

https://en.wikipedia.org/wiki/Death_Valley_Germans