Cool article at NatGeo! It kind of mirrors what you'd expect but those in the most danger seem to be day hikers. After all, they're more likely to have camera gear than survival gear. A gal or guy expecting to be out for a day or two is already fairly prepared.

One interesting quote:

In the study, survivors’ most frequently mentioned source of warmth was clothes (12 percent). Their prevailing form of shelter was camping gear (11 percent). Most survivors had a water source—either their own (13 percent), or one they found (42 percent), be it a lake, creek, or puddle, or derived by licking leaves or sucking moist moss. None of the survivors except one were missing long enough to make starvation an issue, but 35 percent had food they could ration to keep their energy levels up. All these data points suggest that the best way to survive getting lost in a national park is to already have the clothing and gear needed for warmth and shelter during the night, as well as some food and water.

Again, pretty much what you'd expect. Based on this I'd say leave the fishing gear and snare making equipment at home and take a BIC, a water bottle and warming layer!