The main idea behind bonding is to make the body, frame, and other parts of the vehicle contiguous, from a DC and RF standpoint. If the antenna is mounted on a side rail, you don't need to run a strap to the frame. But you should strap the bed to the frame on all four corners.
The exhaust system, hood and radiator shell are important as they help reduce the amount of ignition RFI. Strapping the door helps from an image plane aspect, but really doesn't do much for RFI reduction.