The funny part about what you said, is that in reality, a sharp knife is
much much safer than a dull one.

I agree with the above statement.  When I was in Cub Scouts and Boy Scouts, we were always advised to keep our knives sharp, and the Scouting manuals provided instructions on how to sharpen knives.

A small pocketknife is a good item for a cache.  A large knife is not a good item.  Ammo cans make good cache containers in the backcountry (but not good for many areas in the city, due to concerns about "suspicious" activity), but live ammunition in a can is not a good item.  (Could such ammunition explode if the cache gets too hot during the summer?)

Thank you for providing the permit information.  I would like to go on this trip to get El Camino del Diablo cache in January.

Ken Akerman (a.k.a. Highpinter)