My relatives once invited a French exchange student up to our cabin in northern Quebec - and had to come back early, because she found the isolation too frightening.
For me it was idea of walking into the woods, losing your way and never being heard from again. I can see how that could lead to a crushing feeling of isolation. It's just something I had never considered previously.
Kind of ties in with this: https://www.nytimes.com/2019/07/21/world/europe/netherlands-dropping-children.html
The NYT freaked out over the Dutch tradition of children's parties (actually they only mention scouting groups), where kids are dropped in the woods at night without knowing where they are and left to make their way home by themselves. Predictable outrage ensues, of course, but the risks are pretty low in this part of the world. I've been on one where after a few hours we figured out we had been dropped in Germany, took six hours to walk back. That was a bit much for some of the parents, but it was a pretty awesome experience.
My dad liked to do something like this, only "for real". And he was along for the ride.

What he did, was plan "fly in, canoe out" canoe trips in Northern Quebec. He'd figure out our route on topographic maps, hire a bush pilot to fly us in, and then we had to make it out with map and compass.
We did this every year from when I was pretty young, to when I was in my mid teens. Some of those trips were pretty intense. Sometimes the route, chosen based purely on topo maps, took us down rivers that only existed part of the year, so we ended up travelling up to out waists in swamps (often covered with leeches and mosquitoes). On one memorable trip, we ran out of food, and if we hadn't been able to catch fish we may not have made it at all. Most of the routes were through areas only reachable by canoe and remote from the usual canoe routes, so we never saw anyone else - probably no-one ever passed through there except hunters and trappers.
The plus side was that the fishing was excellent.
Part of the reason northern Quebec is scary is something you have to go there to really understand, and it is this: the place is filled with irregular lakes and forest, and everywhere looks sort of the same; it is really, really easy to get lost.