Mora makes wood-handled knives too, and some are shorter than others. They're not all plastic handled. And they now make a full tang model. There's also the Mora Robust, which is in between.
What I carry depends on the trip: hunting/dayhike, backpacking, canoeing w/-w/out portages, length of portage, number of folks available to help schlep... it all factors in. I don't like a sheath knife much over 4.5"... at that point, a hatchet does the job better, imho.
I'm never without a SAK Huntsman or Fieldmaster. Then, trip-dependent, I move upwards in weight... Fallkniven WM1 (3" blade) , F1 (4") (both stainless), Condor Nessmuk (4"), larger custom Nessmuk (4.5"), Norlund hatchet (12" handle), Machete (about 16"), Gransfors Bruks Small Forest Ax (19"), Norlund Hudson Bay (24"). I've also got a line of saws that increase in weight and size, to match the trip.
Typically, for a few days + canoe trip in the Adirondacks, with easy portages, in the Fall, with my wife or daughter, I'd take a 3-4" sheath knife (mostly for cooking, cleaning fish, and some wood prep for fires), the 19" Gransfors Bruks, and a full sized buck saw.
When solo, I scale back almost to a backpacking load if there are portages. If they are short/easy/infrequent (Low's Upper Dam), I really like a hatchet/folding saw combo, again with a medium length sheath knife.