If you want a knife you can bet your life on, consider a Swamp Rat Howling Rat or a Camp Tramp.
That been said, Kevin the Grey and Ras are on the right track here. The characteristics that will make for that special knife you will cherish forever may not be the same characteristics that will work for me. That is why it is usually recommended to start with less expensive but high quality knives and use them for a while. That will help you to define what you are really looking for. The best blade length, thickness, profile, grind, and steel, not to mention handle shape and material are all very subjective preferences. Most of us in this forum have a selection (a collection really) of knives. It is by using several knives that in time each one of us has decided on a preference.
Before you invest in a more expensive knife in your search for the one you can call your own, consider the Becker Crewman, Becker Brute, Cold Steel SRK, Fallkniven F1, or a Mora 2000. These are all high quality, inexpensive knives that can give some custom knives a run for their money.
You do have the situation that your trip will start in 2 weeks and you would prefer to have your 'special' knife by then. Consider the trip as an opportunity to test different knives and decide what you really like.
Hope you find you own special knife.