I'm down to using a vicky paring knife and a Havalon when hunting.
The 'disposable' pairing knives do work very well where weight is an issue. I pick up Kuhn's at Marshals for like $5 and could carry multiple for the same weight of a normal pocket knife. Bright colors help avoid losing them in the leaves and they even come with a sheath.
http://www.amazon.com/Kuhn-Rikon-4-Inch-Nonstick-Colori/dp/B000GZDY6Q