If you're so inclined... I use a Garmin BC-30 camera in conjunction with my Garmin RV770 GPS unit. The advantages are you have an RV-dedicated GPS, and no need for an additional monitor sitting on your dash... and if you want multiple cameras, up to 4 can be paired up.
The camera signal is STRONG. Mine is wired for constant power... and even when unhitched I begin receiving video over ¼ mile away from the rig whenever I'm coming back to the campground, or leaving.
2013 VOLTAGE 3200 (EPIC I & II)
2014 Ford F-450 PLATINUM