One thing to consider as you prepare your kit for medical situations - you will often draw on resources beyond what is carried in your FAK. The headlamps we have discussed are simply one example. In outdoor situations, you will need to consider hyper/hypo thermic conditions (if it ain't one, it's the other), hydration state, impending weather, keeping the scene safe for everybody, and the like.

It is basically a crash course in improvisation....
Geezer in Chief