>>2798822wool everything helps
soap and water on anything longer than a weekend (brought far away from the stream)
in not-winter I don't wear underwear, just freeball my loose running shorts and let shit air out as much as possible
ironically not doing anything to prevent the stink (spare clothes/deodorant/cologne, etc) works best for me. I still reek but I don't notice if I don't take any measures to prevent it, just never crosses my mind because I am powerless to stop it by not bringing that shit