Mynabird,
We have had similar conversations when people ask us what part of Texas are we from. We have never even been to our "hometown" of Livingston. I told someone that asked at an RV Park I was from Livingston Texas. He said he was from Lake Conroe Texas. Did he ever give me a funny look when I said I didn't know where that was. Turns out it is only 40 miles from Livingston.
When I walk through RV Parks I just assume that all of the South Dakota and Texas license plates are Fulltimers.