I have a surplus East German (I think) entrenching tool that's absolutely indispensable for camping. What the Cold Steel one was based on, I think. Digs beach forts (which keeps small boys busy for hours), pokes the fire and lifts food on and off without risking burns, digs out drains, and on and on. Would make a heck of a weapon if needed, too. Of course I didn't buy three when CTD (IIRC) had them...