I much prefer a smaller knife for overall use, and I guess that if I ever do end up in a pinch, I'll get by with what I have on me. If I do go canoe camping I'll have a 12 inch machete in the pack, and on day hikes a folding saw that is 3 oz is n my day pack. I don't have much use for the big heavy duty so called survival knives.
Several years ago now, our oldest son was in San Jose Costa Rica for 6 month on business, and he arranged for me and the better half to come for a visit. John, being the good son he is, and knowing how Karen and I are wildlife watchers, also arranged for the two of us to have a rain forest trip. It was a guided hiking/camping trip, and I watched the guides do everything with 12 inch machete's. Camp chores, cooking, whatever. They used an assortment of Tramontina and other machetes in combination with a sak that they all carried on the belt in little black nylon pouches along with a Bic lighter. It changed my mind as for what kind of tools were really needed in the boonies. Contrary to a lot of opinions, they do have hardwood in the jungle, not just light vines. They split and chopped up firewood for the campfire, and even carved up the roast pig that they made on the last night camp. For small cutting job, the sak was used. I ended up selling my Randall 14 and just use the saw or 12 inch Ontario. More performance for less weight.
For most of my use, I find that whatever pocket knife I have on my combined with a folding saw works just fine. Both still weigh 6 onces or less. I find that I can split and quarter wood with a saw way easier than with a large knife. If I'm out of luck enough that I am in a survival situation, easy means less calories used.
Carl.