This movie was good, but not excellent. I know its hard to say this and say that about what you would do in that type of situation, but if I were I would:
- gather up and burn the bodies/save some bodies for food
- make weapons out of the sheet metal from the plane
- stay with the crash, at least its more shelter and easier for a search party to spot
- spike walls around the crash site
- if I left the crash site and found that river, I would FOLLOW it. I’m not sure why he strayed from the river..
- and stuff.