I’m a cold hunter, I have some tricks like you mentioned. Woolpower is the best base layer, bar none but it’s fragile, I use the top and bottoms. It dries the best, and has the best loft. I’ll typically go first light kiln over it on top for durability and some wind protection while walking in. When it’s real cold, I have down kuiu zip on pants, a puffy coat, heated pnuma vest, thick wool sweater, first light wool facemask over a wool hat, muff, boot covers, and chemical heat toe and muff packs. I use king of the mountain wool over all of it. Except usually the puffy pants are outer layer. It’s all quite quiet surprisingly. I sat all day the other day and it didn’t break freezing. Dark to dark. I mean I don’t love doing that, but I was not cold. I underboot because I use the boot covers. It was about a mile back up and down some hills, so I get easily heated. Can’t go too warm on boots or it’s just a wet mess by the time I’d get there. My pack is heavy, all the warm crap, plus stand/saddle/sticks