I guess it comes down to how one plans and how one uses a GPS.
I always plan my towing route, and tweak the GPS via points to match how I want to travel. A GPS is an assistance to navigation, not a primary route decision maker to me.
I also always mute the GPS. Never want that nagging. If I miss a turn, so what. Go down the road to the next turn/ exit. Then the GPS can be handy.
I find the GPS planning routes most useful for sightseeing, trips to the store, etc, after the trailer has been dropped and we are exploring the area. It's also very useful for getting me back to the trailer.
We travel towing with two GPS units - my Rand RV GPS, and a Garmin nuvi with great traffic reporting. When the Garmin says there is a major issue - we pull over and look at maps and figure our own route.
The hardest thing has been to train my wife so that she can handle all the functions of the GPS, give me answers to questions, and help with the navigation.
She is the one who looks at the GPS and says - 'we are to turn left on XXX street in one half mile', 'okay, I see the light where we turn.' 'you are in the wrong lane, go past the turn and we will make a series of right turns to get back on course.'
Getting her involved has given her something to do, made her much more aware of what it takes to get the 62 foot rig down the highways and byways.
