When we first moved to Virginia we used to poke fun at all the vanity plate owners. Then we registered and licensed our teardrop and discovered it was only an extra $10 ( one time fee) to get a custom plate.
Shut up and take my money! So now I am "one of those people".
Here's the Vanity plate for the trailer:

And of course, one for the tow vehicle:

Of course when the trailer isn't hitched, the second one is a little cryptic.

