So now a question; I am able to mitigate sweating in snow by layering ... for the most part. My feet still sweat a lot and in the morning I have frozen boots. My old solution was to put the boots in a bag and toss them in the bottom of my sleeping bag. As I grew this became less and less comfortable, and currently I am hoping to avoid this situation on multiple night trips. It seems like liners are the easiest (and Best?) solution. So the solution would be buy a pair of boots with liners and carry a spare pair to rotate out with? I'm going to be swimming in plastic bags with just a thin pair of socks between the plastic and my feet.