Why are they acting as if he's alone?

I like the show, but
why is Bear always saying things like " I've got to try and get across this bridge or cliff etc". And the camera is sometimes already there before him, or one time it showed him running past the camera and the camera was fixed and shot him running away in the distance. Then a new camera is right there with him. Obviously he stopped running and went back to rejoin the crew, it's just silly to show him running away from the camera just to be rejoined the next second.

And when he says "I need some energy fast because I'm dead tired" and he eats some maggots or whatever...isn't the cameraman as hungry, and doesn't he also need some energy? He never gets anything! Doesn't Bear like to share?

But I imagine they have some Big Mac's with them anyway which they eat when the camera is turned off :)