Typically not a true campfire if packed in, but I love my cylinder stove! If in either a truck camp or a packed in basecamp I will have wood set up and ready to light. I usually don't mess with it but I won't complain either if a buddy decided to torch it off.
My preference is to Just crash at night without starting a fire. I'm usually beat and it's well after dark. I just crawl in my bag to keep warm and break out the jetboil stove/mtn house. Once that's going I organize gear for the next morning so I can just grab and go; finalize my hunt plan for the next day, and load up the stove body with wood, any trash or wrappers from meals/bars, and just a few squirts of lighter fluid (I keep a small, partially full can of Zippo refill fluid, about 2oz). Then in the am when my alarm goes off I just touch off the kindling and go right back to sleep. About 15 minutes later it is so hot inside that tarp that you will literally jump out of that bag to get some relief. I sleep cold and the worst part of backpack hunting for me was getting out of my warm bag on those cold, cold mornings. It gets tempting to sleep in after 3-4 days or on especially cold mornings. But this system has worked extremely well for me. Really gets me moving on those days and makes the entire experience so much more enjoyable.
I have no concerns about the smoke disturbing animals. I don't even think they associate the smell of smoke with hunters.
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