Ive been using the Veise wireless system for over 5 years now and it still works great. Bought it off of Ebay. My camera is mounted high and centered on the TC, and wired into one of the rear marker lights. When I turn the parking or headlights on the camera is on. If its during the day and I need the camera on, I will just flip on the parking lights. When the truck lights are off the camera is off. Veise seems to make a decent product.
2009 Silverado 3500 dually D/A, Supersprings, Stable Loads, Bilsteins, Hellwig Sway Bar.
2010 Arctic Fox 1140 DB, 220 watts solar, custom 4 in 1 "U" shaped dinette/couch, baseboard and Cat 3 heat, 2nd dinette TV, cabover headboard storage, 67 TC mods