I am of a like mind with Pika. I would go with a laminated carbon steel Mora. I think big knives (anything over 4" blade) are way, way overrated. If I am going to chop something, for equal weight and much greater efficiency, I prefer a hatchet, probably combined with a lightweight collapsible saw. The only time I ever needed tools like that was when brushing out a LZ for a helo, hardly an everyday task.

If I am going to be digging, rather than abuse a knife, I just carry one of several pry bars. Your home center will have lots to choose from.