Garmin RV GPS 770 LMT-S
Garmin is the leader in stand alone GPS units. This model is specifically built for RVers. It has a larger screen that is easier to read when further away from you. It also takes into account the size of your RV to try and anticipate low clearance bridges and tunnels. Some additional features for RVers include steep hill warnings, and the ability to connect this unit to a wireless back-up camera.
If you are looking for a dedicated GPS unit for your RV, this one can’t be beat.