The dawgs have given you a lot of different ways to look at expanding your knife collection. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />

Let me offer one more. The size of the knife should scale with how remote your adventures are. If I'm going "deep woods" I want a decent chopper with me. If there's an emergency I want to know I can craft a shelter and stay warm. I'm not a fan of small axes and prefer a chopper as it is the more comfortable choice for me. The weather in the mountains is flat out unpredictable. And Mother Nature kills the unprepared with fearsome regularity.

For weekend trips where civilization is not that far away, an all-in-one S6 or Dumpster Mutt style knife is usually quite sufficient. As others have also pointed out, a smaller pocket knife a great complement to whatever other fixed blade knives you are carrying. The One Hand Trekker is my pocket knife of choice in the woods.