I second what someone said above -- one blade. Make it a Bob Dozier Pro Guides knife, and you'll be all set for cleaning game, self-defense, shaping logs, etc. No, it's not good for felling trees, but you don't usually need to do that while hiking or camping (find a downed branch, and a bunch of leaves, and you've got a good survivial shelter), and remember the title of this topic is "Most efficient...Least Waste."