|The F.A.K. is an essential item on the trail...|
This will save your butt when you fall and if you are proficient, you can pack enough medication and wound management kits on the go.
Highly recommended are the pre-packed kits from Adventure Medical Kits.
These are sold in the US for as low as USD$7 for a personal kit and as high as USD$700 for expedition kits.
If you plan to haul, its wise to pack a simple first aid kit.
Stuff like wound closure adhesives, gauze pads, irrigation fluids and personal medication can be carried.