Your map, your rules.
For me, my current map has states on it that I've camped in and driven through in pursuit of camping with my current trailer. For example, I've never spent the night in West Virginia, but I pass through it all the time.
That said, I didn't put my map on the skin of my trailer. I put in on the glass that's in large picture frame. The map is on the outside of the glass. I can hang it in doors or outdoors. Because of this, if I should change trailers, I will take the glass map with me and then add states the new TT has been in.