I have been researching RV GPS's for some time now and have narrowed my search down to the Garmin 760LMT. Seems like it has the best reviews out of all the RV ones. I'm just not sure that I am going to like the 7" screen as that seems pretty large to sit on the dash. Amazon has it on sale now but I have seen them post a lower price a few months ago than what is listed now.
2014 Jayco Whithawk 28DSBH
2012 F150 SCREW 5.0 XLT XTR Off Road package, 3.73 EL, tow package, Peragon retractable cover.