I've had only limited success with trowels. They dig slowly, have little leverage against stones, are weak to no good against roots, and then bend or break. I've tried the plastic ones (light weight - OK if digging in forest duff or sand where hands would have done the job anyway), and metal ones. No matter how well braced a trowel I bought, it bent. I was half hoping someone could site a light-weight trowel tough enough to do the job. Not yet.
Ron likes his machete for general camp work. It works well for him. I don't particularly care for - but use because it does acceptable work - my folding entrenching tool. It digs holes in almost any kind of dirt, pounds in tent stakes, and turns those heavy - sod like - pancakes that some camp cooks serve up. And, if I inadvertently let slip a comment about those pancakes, it works fairly well as a self-defense weapon against the cook.
Still, if someone has a lighter, as effective tool they know of, I'd like to hear about it.