I did some studies on sharp tools for trekking and camping this week. The three things I learned about were multipurpose tools, knives, and axes.
The multi-tool was my favorite. The multi-tool has many different uses and a very important part is that it is small and does not take up much space. It normally has a plain blade, serrated blade, a saw, and a file. Not as common parts include bits, can openers, scissors, and pliers.
Knives provide ease during trekking and camping. A fixed blade knife could even be used to split wood for fire if needed. You need to know how to use the knife before you go camping/trekking or it might not be the right knife for your needs. Some good rules to follow would be to ovoid tactical knives and odd-shaped blades. You will want a full-tang or narrow-tang knife that has a 4-6 inch blade.
Axes can be used for chopping, limbing, and splitting wood. A 18″ axe is probably the best to bring because it is versatile. Use caution when using axes because they can hurt you if you do not know how to use it.
These are the three sharp things that you may need when camping or trekking. Be sure to learn how to use each one before you begin so that nobody gets hurt.