You might give the Dajo Ascent a try: it's about 2.75 inches when closed, has a two-inch liner-lock blade, opens and closes easy with one hand, has an integrated clip, and a pair of so-so tweezers in the handle.
I've had one tucked into my belt for a few months now and I really appreciate the portability and utility. I haven't used it in the bush.
From what I hear, it's a lot like Boker's SUBCOM line; you may want to look at those for a similar form factor.