I couldn't find any mirrors I liked so I went with a Haloview camera system with one camera on the back and two side cameras. The screen can be set to show all three at once. It has it's pluses and minuses over mirrors, and may not satisfy the legal requirements for mirrors, but I guess I'm willing to take that chance. As for safety, it shows me everything I need when driving down the road, and then if I have someone helping back in I can turn on the microphone on whichever of the cameras I want and can easily hear instructions. The only real minus is that I think mirrors can show an object at a greater distance, but these work and show me what I need way before another vehicle is an obstacle. This solution works best if you only tow one trailer that needs the extra view. They're not made to move from one trailer to another on a regular basis.