I'd say it depends on where you're gonna be... In the rainforest, it seems like you'd need a large, machete type knife for clearing paths, and for chopping and splitting wet wood.... In snowy mountains, you'll need a large knife capable of splitting wood to get to the dry center in order to build a fire, and to help make a shelter and build traps. From what I've read, a jungle knife is better if its longer and thinner than what you'd have in a snowy mountain area - where you would prefer a shorter, more stout blade.
Well, after all that gabbing, I'll fess up and say that it's all book knowledge as I live down in South FL, and have never been in a jungle or in snowy mountains
Hope to soon change that, but for now sawgrass, snakes, and gators are about all I get down here.
Without knowing exactly where you're gonna be, I'd agree that a knife capable of splitting wood and a firesteel would be on top of the list...
-ZZ
[This message has been edited by zerozappa (edited 02-04-2001).]