It's usually coolish where i walk, so I always have a 'clean' layer, put on after ablutions - hate that sticky old sweat feeling in bed!
So my nice new toasty down jacket stays sweet smelling too
I pick a sleeping bag to match expected temp, with silk liner. Have a 'silk weight' thermal top, and a 2nd pair of polyprop thermals - one to walk in, one to sleep in. And always keep 1 pair of dry sox for eve/sleep. I find it much easier to cool down than warm up during the night, so would rather take off long johns if too warm than put on layers if too cold.
If 'walking' thermals & sox are wet, i put them in a plastic bag in the foot of my sleeping bag for warm rather than frozen feet/body in the morning - if no hut / heater / room for drying. (Oh, and now i have wet feet (good boots died), i wash my socks out first because they're soaked already.)
Learnt about the solid iced boots, sox & woollen pants the hard way (showing my age now, i know

)
BTW, I've recently started taking a pair of very basic nylon overpants to wear over my clean thermals in the evening. ($1 at an op shop). They weigh less than anything else i've taken, and because they keep the wind / cold air out, I'm warmer in them than in the fleece pants i used to take.