I had to give this some thought, as I usually have at least 4, upwards of 6, knives on me for "optimal performance"; and because I just plain *like* them, of course.
But if limited to 3, and in order to get the job done with a minimum of fuss, I'd choose my Kumar Kobra khukuri, Leatherman PST and an Opinel folding saw. Anymore I prefer to saw instead of chop, so the khuk is there for its role as a splitter of the wood harvested by the saw, and for shaping wood and just general purpose use. The Leatherman would cover everything else.
I actually had a hard time coming to choose the PST, as I was originaly thinking of my Victorinox Mauser. But I like to have pliers handy in the bush, and the PST has all the same tools (and a few more as well) as the Mauser, except the saw, but that's covered by the Opinel. The only real stumbling block to choosing the Leatherman was that the PST I'd had before this one had a really poor knife blade. The old PST blade wouldn't take OR hold an edge worth a darn; but this later model PST has MUCH better steel in the blade, as well as a better grind and shape to the blade.
With those 3 on my belt, and my M6 over my shoulder, I'd feel just fine. But I'd switch the .22lr pistol for my GP-100 in .357, please.
