Double, that would be a book that many of us would very much enjoy reading! Great adventure, sounds like you guys had it nailed, too.
I can imagine that adventures like this will become increasingly popular with the crowd of runners who have crossed marathons of their life's 'to do' list. I highly doubt that many less serious adventurers would have the forethought necessary to handle whatever comes your way. I think it sounds like a great time. I think I would only go with someone who has gone before. No way I could anticipate everyting!
Thanks for sharing, Double!