Check out the LED work lights at Northern Tool, very bright and the mounting brackets are stainless.
http://www.northerntool.com/shop/tools/product_200407598_200407598
I have two of those mounted on the back of my Callen Camper rack, plenty of light backing into a camp area, way more light than needed for a campsite. I would suggest wiring two of these lights with each one having a SPDT Center Off switch.
I have both controlled thru one switch, I will be changing to two switches.
A single pole, double throw switch with center off position.
The center terminal will go to the light, one of the outside terms to reverse light wire on that side, the other term will go to B+.....giving you 3 positions...light on when in reverse, center always off, light on by battery for camp/ recovery.
You can buy a round magnet and bolt it to the LED work light, and with a 12vdc power cord, it becomes a very handy vehicle light.
Eric