Sorry, this is still day dreaming stage. I've done no research. The only thing I bought are @Travlin's Weatherguard roof rails. Also not installed.If going this way, any thoughts on cameras with high resolution, frame rate, and a convenient package for mounting on a roof rack?
I've got vague ideas for a DVR and a large LCD monitor located near the bed. Small monitor to fit over the current rear view mirror. It might have to be five cameras. The fifth camera to take the place of the missing slider door window when trying to see cars coming from the right. That one will be relatively narrow FOV, 90 deg I'm thinking.
The rear camera will be very narrow FOV, 60deg, so it'll mimic a rear view mirror. The other three will be wide angle 160 deg FOV. I already have a wide angle backup camera replacing the third brake light.
Let us know what you come up with. I'm sure it will be much sooner than I get to it. Apparently like you, I've learned not to custom install things. For example, mounting a camera in the third brake light housing. It will eventually fail, the old one will be out of production after all of two years. Then you have to redo the housing to fit the new camera dimensions.
Mounting on the rails minimizes drilling holes for the cameras. If I screw up the camera choice with too low specs, resolution, or cheap, it'll be relatively easy to replace them.