My wife and I agreed that the map has nothing to do with the RV, it shows the places we visited, or lived in, together. Not just passing through, had to stop, see something, or stay overnight. After she died, I added some places I've been without her along. If I went first, she would have added her places.
You work it out with your wife. If you can't work it out, my advice is do it her way.
If she knows what she wants the map to mean, what anybody else does probably won't help you change her mind. Our map was there because my wife wanted it, and it wouldn't leave a different color underneath, I'd maybe pull it off.