My old guts can handle beef jerky OK. My old teeth, not so much.
Fiber’s the thing, you’re mostly dehydrated all day, if ya don’t include fiber you may never crap again until the trip’s over.
"...if the gentlemen of Virginia shall send us a dozen of their sons, we would take great care in their education, instruct them in all we know, and make men of them." Canasatego 1744
