I searched for this topic, since the sisters hiked the Appalachian Trail in 2001, and couldn't find a mention. This is very interesting, as they hiked the whole AT, barefoot, then turned around and walked back!
[url=http://www.barefoothikers.org/barefoot-sisters.html]Barefoot Hikers of PA: Barefoot Sisters Isis and Jackrabbit[/url]
They have written two books about their hike. "Southbound" and "Walking Home". I enjoyed them a lot!
But they didn't walk the whole AT barefoot. In winter they wore hiking shoes. But still impressive! I guess they would enjoy today's minimalist shoes and would have used them.
I need to get these books.I love reading about others journeys.:D