In reply to GarethSL:
Survival bag as water collector
Chalk to write messages visible from above (until it rains!)
Rope to lasso passing herds of meat
Helmet as porta-potty
Nuts as jewelry trade items when meeting lost tribes
Bouldering mat as flotation for raft building, slings to lash together
Tent as sail and mast for said bouldering mat raft
Torch batteries to get spark for fire lighting. Possibly.
Troll Omnis to hang from tree as emergency signal
Deadman as shovel for latrine duties or the burial of the picked bones of whichever companion got the short straw when the food ran out; ice axe as handle