Another option (what I did, not saying better, just different).
I installed a red LED light bar that goes under the tailgate and goes all the way across from side to side. I ran a flat-4 from the front of the truck to the light bar (that I can plug into the flat-4 on RV). When I tow the truck, I plug it into the RV...when not towing the truck, I plug the light into the trucks own flat-4 (part of tow package of the truck).
Its VERY bright, has brake lights, running lights, and turn signals. total cost was under $200 and use ti both towing and when not towing.
I do like the idea of a wireless set-up though. Good luck!