"Back in the 1870's when I used to backpack a lot..."
REALLY??? If you were backpacking when you were fourteen, that would make you 145 now. And you can still see and type, not to mention think?
You need to contact the Guinness people at
http://guinnessworldrecords.com/records/human_body/default.aspxAnd I'd do it right away, if I were you...

Right NOW, in fact.
Sue