I'll go a week straight wearing my poly liner socks and merino boots socks........even from base camp. No issues.
I've lived dirty for weeks at a time, its hard to get dirtier they one gets on the fire line. Pants that will stand up on there own, shirts that won't come clean after being washed multiple time and underwear that just needs thrown out once home but theres something just wrong about putting on a pair of crusty stiff socks in the morning. Ya i've worn socks for more then a day at a time but it just ain't right.