I don't own a model 18 however, to offer my two cents. In real life scenarios, it's all about maintaining body temperature and staying hydrated. If I had an 18, I would use the handle to carry plenty of fire starting materials. I would want to have as many different ways to get that fire going as possible. Storm proof matchs, a flint, some steel wool, carbon cloth... little birch bark, and I would make sure I knew how to use each one of these before heading far off the trail.

The other stuff is cool and I like looking at it, but real life -think stay warmth, be able to signal and stay hydrated.