The only way to actually survive is to hunt big game. Fish is too lean. Vegetables have no calories. Small rodents have very few calories. Fatty meat is a necessity.
In alone, they are forced to transport heavy camera equipment. They start out right before winter. The local laws prevent them from actually hunting. The show is a joke. There is no surviving actually done. Just enduring starvation. The optimal way to win is to select fatty food as many of your 10 items as possible, make a shelter, and expend as few calories as possible. But that isn't entertaining to watch, so they won't select you to be on the show.