I have to second to Cold steel Ultimate Hunter. I've been in the construction trades for about 45 years now and have always carrying a large folding knife. Some of work better than others but we seem to be in a pretty good place these days with the affordability to utility ratio of what you can buy.
I have carried, used, or handled almost every knife mentioned on this thread. I can't stand any kind of frame lock knife as with continued use with sweaty hands the frame lock always gives me hot spots. It's hot and nasty down here in South Texas for long periods of time and even though I do a lot of rough work I hate to work gloves. I sweat a lot and use hand tools all day long, so no frame locks or misplaced pocket clips for me.
Had a couple of other Cold Steel products, but like most Spyderos, the flat scales were not comfortable for long use as they were too slender to grip (I have very large palms) and use for extended periods. My size palms, I can cover an entire 4 1/2" easily.
Just bought the Cold Steel UH, and can't get it out of my pocket. It's light, has an excellent blade grind for work, is surprisingly slicey, has that incredible Triad lock, a perfect size pocket clip and great steel. Maybe the most important aspect of this knife though is how comfortable the handle is. It is comfortable to hold, comfortable use, and it is sculpted g10 instead of just flat scales. The scales are plenty big and fill my palm with a little bit left over. The handle doesn't get any hot spots, the clip is out of the way when using the knife and it is very comfortable to use with light work gloves. For me I find it hard to get a knife the size that is a slicer with a blade that is sturdy enough to stand up to some kind of light damage that inevitably occurs during the work week. This one takes battle damage well, and is easy to sharpen.
And unlike my liner lock knives, when I have on work gloves I sometimes have to take them off in order to close the blades. Not so with this one, like just about any other lock back thumb press gets the job done. Been using it out in a field now for about 3 months and absolutely love this knife for all kinds of reasons. Out of my 30 or so "work and camp" knives, if I was taking off on the adventure you describe and could only take one of them I would take this one.
And you can probably find it delivered to your door for about $125 to your door! I bought this knife in blaze orange scales as it will be going out hunting and camping with me. Spent too much time working for a knife or other tools that have been dropped in the grass when hunting or hiking that required a lot of time to find them. The orange should take care of that.
Robert