Most of the errors in routing are operator error. Like the RV learn how to operate the equipment correctly. Then ALWAYS check the routing, there are some errors in the GPS data bases. GPS or phone GPS will be behind the curve on road closures and new additions, but updating helps. Position awareness, have an idea where you are and where you wish to go, most likely a boat ramp or a mountain gravel road is not what you want to travel on. One last caution, always check the how to get there on campgrounds, this is where I have found the most concern routing under a car only RR bridge or over a bridge that wont carry the weight. Now all that said I am a GPS junkie, I cant move without it. For me the RV760LTM or the new RV770LTM are the only way to go, but the new Heads up system that you can drive on could be next(little tongue in cheek here)maybe! Between the RV GPS, gas buddie and RVparky I got it covered. OH we do carry a good atlas, but I dont think we have blown the dust off in a couple years.
LEN