Power switch?

Hey all! I couldn't figure what thread this should land in, so I figured I'd start a new one. I'm building up a rear drawer system in the bed with OBA, and I was thinking of putting some switches back there for the Air, Bed Lights, Awning Lights, and a usb charger (essentially only stuff to be used when camping or out of the truck.) My Question is how can I wire a switch in cab to only send power back there when its flipped? Thanks!

 

Run your electrical from the battery to a switch in the cab then to a switch in the bed and then to your accessories. That way the switch in the bed will only work when the switch in the cab is on.

 

I Guess I just need to figure out the wiring set up for the switch backs then! Thanks!