What sort of interference are you concerned with? Backup camera video feed causing noise in your radio, or video problems when transmitting on your ham radio?
Most backup cameras only operate when in reverse, so I'd expect the interference to the radio, if present, would be relatively rare. If it's video interference that's the concern, I'd again point out that backing up is done rarely compared to just driving, and suggest that time spent talking on your radio while backing up would be vanishingly small.
The use case for radio use while backing up is using a pair of hand-held radios, ham, FRS, or GMRS, for someone outside your rig to guide your maneuver. In that case, their eyes would trump your backup camera's view.