Garmin desl 760 is the best of both world's , you have a RV mode and a Truck mode and auto mode , it will have camp ground and truck stop's listed and everything between. is around $ 400 thow but worth it
in truck mode you can program in Hazard matte-rail like propane , and it will reroute you from going on bridge's or tunnels that don't allow propane .
also you can put in your RV or trailer dimensions and weights so you don't hit no low bridge's
There is also a rv760 by garmin same unit but with out the truck info and no hazard materiel section , Go with the desl 760