We bought the Garmin 760 LMT a few months ago. Just getting near the end of a trip through 7 western states. The Garmin is "good" but still has some shortcomings. Seems to be the no. 1 choice for RV-ers. Does make an error once in a while and can send you off course either on a highway or in a city. When heading out on a highway leg or a trip around a city, I still use a paper map or sometimes a map off the internet so I can make sure both agree. It sent us totally off course on the freeway in Utah for absolutely no reason onto a road that was slower and longer.
Tried to set up the Garmin with Basecamp before our trip but it is not exactly user-friendly and we gave up for now. Will look at the RV Trip Wizard and see if that'll work for us.
Also got the Garmin rear-view camera. Bought the extension cable and mounted the transmitter at the front of our TT. The image on the screen is so grainy that it's almost impossible to see anything. Sometimes the camera image won't come on and sometimes it does when in reverse. Will have to contact Garmin when back home and see what we can do.