I disagree with the fog suggestion. If you are going to use them for camping and more light rather than just backing, I would get some flood lights. I have 2 55w Pro Comp fogs on the rack that I use for the same thing you will use them for. IMO the beam pattern is too defined. The fogs light up a rectangle about 20 feet wide and about 10 feet deep behind the truck, but nothing at eye level or near the back of the truck, if that makes sense. They help, but it could be much better with a different beam pattern. I'll be switching to a set flood lights when spring rolls around.
If you want some pics of my setup and how I mounted things and routed the wires, just let me know. Would love to help.