The Survivorman in Africa episode last night was almost a send up of the knife fans amongst us. He bought a machete and his ever present multitool (which is never identified) and a 'big ol knife' with no more details given. Then tied it to the end of a stick to use as a spear for predators. It seemed that was the only reason he wanted it.
One of the most respected people in the survival field usually just brings a multitool.

The Sock