my traveling underwear quota was just upped to three. there are the two which go through the alternating wash/wear cycle and one emergency pair because every now and again it does a world of good for me to put on some clean cotton before dealing with some misadventure.
besides girl stuff, i think i pack the same as any feller.
about being cold: i've decided that it's completely worth acquiring some foot warmers. once, after kicking my pained and numb feet around all night, i had to run out of train yard and nearly kerplowed because i couldn't make anything below my knees work.