All these suggestions are great. I just started carrying a Cold Steel machete in the vehicle. Go for one of the thicker, 2.8/3 mm ones, though, not the thinner 2 mm Latin series. The extra mm really makes a difference, I'm told. Mine is heavy duty, doesn't flex, and does a good job at chopping, splitting, and giving a sense of security if I run into wolves and badgers. (That last bit a snarky reference to another thread--I don't run into wolves or badgers and wouldn't kill one if I did.)
CS is the hype machine of the century, but the machetes are durable and inexpensive, great value for the price. Sharpen up easily, though the 1050 dings easily on rocks or nails. Should you aim wrong and hit one, a file like that found on most multitools takes quick care of it and puts mine back to nearly shaving sharp. In fact, a Leatherman or SOG Paratool (my multitool) secured to a machete sheath would be an outstanding package. Add a ferro rod and some paracord and there's not much more you need.
Zieg