I use a 9 inch leuku and a 3,5 inch knife. (the lengths are blade lengths)
The leuku is carried strapped to my pack, and comes out in and around camp. mostly for chopping tasks.
The small knife is in my belt for accessability and gets used the most.
I do want something in between, a 4 inch blade, but one has not made it's way into my arsenal as I just cant justify it. The smaller knife makes the tasks of a small knife better, and the big knife tasks is better taken care of by the leuku.
The only thing is that a 4 inch blade would be better for batoning wood, but I hate risking my knife doing that, so I'd rather carry an axe.
Someone mentioned that by using bushcraft knowledge, you can eliminate tools. But good bushcraft is also knowing what is the most efficient tools for the job.
And then what gets used/carried must be up to the prefrence of each individual. Sure, you can split wood by using the saw on your SAK, but why on earth would you want to other than as an excerzise to
perfect the teqnique in case it would be needed?
Sometimes it's like bushcrafters go out of their way to complicate even the simplest of tasks...using a SAK to split wood...he he
So carry an axe, or if you preffer, a knife blade that can be pressed into service as one if you must.