I am also a fan of the gerber river shorty.

I wear it on the hard point on my life jacket. It is a snap-sheath style. This means I can easily access it with either hand.

I haven't tried to go through a tramp with it as a test but I am confident that I could. The blade has a blunt squared of tip that can be used as a screwdriver or to pry in an emergency. The blade is thick so that it won't break easily.