training, yes.

what you carry is dependent upon your circumstances.

as a hiker i do carry a few things, certainly a lot less - my pack isn't much bigger than his first aid kit - than a trunk fak.

4 x 4s + roll gauze (kerlix) can solve the life threatening bleeding.

imho anything else is icing.
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“Everyone should have a horse. It is a great way to store meat without refrigeration. Just don’t ever get on one.”
- ponder's dad