CAMERA QUESTIONS, My Laramie should be arriving any day. I ordered it with CTR Stop Lamp w/Cargo View Camera, Surround Camera System, and Trailer Reverse Guidance. I decided on adding a Bed Cap. I'm assuming this will cover up my digital rear view camera. From what I have read, the Trailer Camera Prep allows for camera to be placed on rear of your trailer and show on your rear view Digital Mirror. 1st question: For you guys that have used this, can you set the trailer camera to be viewed in rear view mirror for your entire trip? If so I'm thinking I should have ordered the Trailer Camera Prep and could have mounted the trailer camera on the back of my cap so I don't loose my Digital Mirror function due to that camera be blocked by bed cap. 2nd. question: Can I order the "Trailer Camera Prep" after the fact and install myself? 3rd question: Are trucks with the digital rearview mirror already programed for the trailer camera (just add the "Trailer Camera Prep" ) plug and play?