To save clutter on dash you can use the Hema screen for the camera, though if you wish to have the camera on to view behind trailer while in forward motion obviously the Nav part wont be shown, though believe you can fit a switch to swap between the two, My Pajero doesn't have a screen or camera either this was the way we looked at going, though I want the car camera to work when not towing and I don't leave my Hema in the vehicle when not being used so a separate screen is the go.