Only time I've ever cut in cold conditions was in new zealand, and it wasn't really all that cold anyhow. Had frost, but only occasionally light snow. We'd get a small fire going in the morning just to get some heat into our bodies but nobody really fussed with keeping it going. There was no landing though. Having a hot meal is a wonderful thing, and I got into the habit of bringing along a small campstove, they only cost a few bucks and travel well. Most of the forestry blocks where I was working are small, and owned by farmers. They're mostly sheep farmers, occasionally dairy. All the flat land is used for grazing and they plant out whatever land is left, the steep ground mostly. Because of the size of the blocks, the crews are also small and you might only be working a block for a week or two, sometimes even only a few days. Many of the farmers would be happy to sell you a lamb for $50 which is a real bargain. They'll usually slaughter, skin and gut it for you, leaving you with a carcass. That's enough meat to keep two men eating breakfast lunch and dinner for about a week in my experience. One of my favorite lunches was lamb stew, which was just odds and sods. Get a big pot and throw in a few diced onions and whatever miscellaneous bits of meet came off the carcass. The neck, shanks, and whatever flaps were leftover after you butchered it up into hindquarters, legs and ribs and backstraps all go in there. Then hardy vegetables like leaks, squash, pumpkin, potatoes, carrots etc, few cans of diced tomatoes, beans, some tomato sauce, chilli, salt and pepper etc, top her up with water and finish it off with some silverbeet when it's ready to serve maybe. Those tougher cuts need a lot of cooking, but they're so full of flavour. If you simmer it up 12 hours or so it melts in your mouth. I'd start it off the night before, and go to bed. In the morning turn it off and take it to the job then reheat at lunch with some crusty bread rolls. Had no trouble getting the boys to throw a few dollars in the tin to cover the cost.