Camera Help?

For a project I am working on a weird kind of tag game to play around in the Oculus Rift (or outside it as well).

Basically I need to have the player move (they only move forward and back), they can turn their head basically from the Oculus movement, and to keep it basic their out reached tagging hand should have a limited range of rotation within their field of view.

Ive been working with the Merry Fragmas tutorials to draw info and inspiration (this will also be multiplayer so I know I have to add PUNviews as well) but in that the gun is static and always just points towards the center of the screen.

So I guess I'm just stumped on how to make all these separations. Player movement is basic and I can handle that. But how to I separate the idea of mouse look from arm aiming?

Thanks much. And for reference I am a beginner aside from the standard tutorials.