Folding Sven saw for backpacking. Light weight, safe to carry, safer that a swinging blade, and capable of handling anything a light axe would handle. Just cannot use it to drive tent stakes. but you could cut a short length of wood with the saw to drive stakes.
For car camping, a 24 or 30 inch bow saw. If you anticipate 4 inch or larger diameter fire wood, add an axe to split a few pieces to start a fire.
Since one couldn't split with the Sven saw, another option might be a double bladed cruiser axe with one blade ground thin for chopping and the other ground thick wedge for splitting. Since these have a lighter head and a shorter handle than a felling axe they would be less efficient for taking larger trees down.