Most of my hiking/backpacking is with either scouts, or my sons. Since I have kids with me, I bring more stuff. Mostly this is first aid and survival related. I try and go places where people aren't, so I expect to not see anyone. I also don't expect others in my group to have something I need, unless I specifically give it to them to carry (which I do sometimes).
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I've taken a vow of poverty. To annoy me, send money.