MrHare
Summit Camper
Not my own (Spine Race? I should dream of being half that fit), but I thought this might be of interest, since it's very minimal, very light:
http://richrunnings.blogspot.co.uk/2013/02/the-spine-2013-my-kit-list.html
http://richrunnings.blogspot.co.uk/2013/02/the-spine-2013-my-kit-list.html