I have one of these on my belt all the time, with a blade tech sharpener in the glovebox, guts rabbits, cuts pegs, sharpens pencils etc etc. And if you loose it not the end of the world.
http://www.heinnie.com/Knives/Mora-Knives/Mora-Clipper/p-92-304-4200/
Got both of mine for less than £10 shopping round and at game fairs