Brit Ben Fogle had a TV series called Where The Wild Men Are where he visited people living off grid.
The most remote I remember were a couple in Canada I think that were 100 miles from the nearest town but there were no roads to get them there. Their son would visit using a sea plane and land on the adjacent river.
I also remember in an episode of Michael Palin's Pole To Pole that they were still in the Artic Circle when they came across a house in the middle of nowhere with a guy living on his own with his dog. God knows how far he was from civilization.
I could (maybe??) imagine a bolt hole that required a seaplane or helicopter such to get to, but not where I lived. I totally respect other peoples decisions to do that, and I can see the attraction, but I found the isolation of lockdown pretty tough even though I wouldn't describe myself as an introvert.