Pee bottles, they make sense, not hard to figure out (for males at least). But what happens what it's time for #2 in extreme conditions?
I know big mountains will sometimes make use of "blue bags" or "clean cans". But these places also have sheltered areas and buckets or whatever to hold the bag open for you no? What about areas with no regulations or shelter? What about -30F or less with 100MPH or more so wind chills that are insane. I can't imagine you are supposed to do anything in the tent you sleep or cook in, even in extreme conditions. What if you are on exposed rock or ice? 2+ foot snow?
Just go off trail/out of camp a bit and go as fast as possible?