Sometime cloud cover was low enough that there was no view. It was like working wrapped in cotton batting.

You can see SOMETHING down below, could get weird otherwise.

I've experienced blizzards >24 hours when you did not go far outside your front door, seeing virtually nothing for hours at a time in front of you, and deep snow gave no landmarks. I have a friend who died west of Boulder, having done so (though she may have had a heart attack--no autopsy was done).

So, yeah, that fog would certainly feel isolating.

Sorry - very off-topic. But isolation is scary in many forms. That's why prisons use it as punishment.