I have the Garmin RV 760 LMT and love it. I have it mounted on the curve above the speedometer. I never have to look down. One time it told me to take the trucker's lane on a freeway interchange. I couldn't figure out why. That is, until I looked to my left and saw the low overpass that the regular drivers were using.
You put in the length, width, height, and GVWR (for going over bridges) and it avoids places where your RV can't go.
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