I'd love to see more information on this. How did they get so remote and why to the point they could not walk out? I can understand getting stuck. It has happened to us on the Gunflint Trail in our 4 wheel drive pickup truck but our walkout for help was a road and only two miles.
We actually got stuck in the snow on 11,551 foot elevation Hoosier Pass between Alma and Breckenridge, Colorado last week. We pulled into the snow laden turnout at the peak for our photo op and got stuck. We could not back up. Fortunately, a guy moved his car for us and we could easily move forward to get out.
This is after we got back on the dry pavement.