Seems like you want a knife that can finish the job without needing sharpening to avoid having to carry a sharpening stone. There are some options for touching up a blade out there that don't require much space or weight. DMT makes diamond sharpening stones that are only 4 inches long. Spyderco ceramic rods are good along with other cheaper versions. They are the size of a pencil. I'm gonna come clean and admit I make knives and for work, need a blade that can finish the job with nothing more than touch ups at the most. As mentioned above, there are some really good modern steels that are capable of so much. I've seen people get by with box cutters but I just don't get it. Many of us spend so much money on a variety of gear but seem to be less willing on good knives. There are a bunch of good makers out there that can make a knife capable of so much. Steels such as S35VN, Magnacut, K390, D2, etc with thin edges and proper edge geometry will do a ton of work and be easy to sharpen when they need it. A maker can do things to help you save weight too. I taper tangs and use wood when weight is important. If I didn't make my own, I would use something from Bob Dozier. I think his fixed blades are affordable for a well known and established maker. I spend more at the grocery store every week!
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