I think the map on the trailer should signify all the places you have camped - in any capacity - tent, current trailer, previous trailer(s). It is really there to let people know where you have camped.
I don't have one on my trailer, but the one in my signature, below, shows all the places I have camped, according to the criteria above. That's been in a tent, two pop-ups, my previous Outback TT, and now my Jayco.
(There's a few small states on the east coast I just passed through, so they are blank. But hard to tell in an image that small.)
But to each, their own!
Just my opinion.
2015 Jay Flight 32RLDS Elite
2012 Chevy 2500HD Crew Cab LTZ (6.6L Duramax/Allison)
Equalizer Hitch (1200# bars)