I was told indeed by a Pennsylvania native who has lived in the South for a while that the stereotypical Southern Belle IS very prim and proper, but can be two faced.
I may not fit the stereotype. But after 11 years living in the South, I do consider myself to be a Southerner. And it has been relevant when I travel to other parts of the country.
There are plenty of transplants in Savannah; it's a fun place to live. My family's there but it is not like the society stuff is the only stuff to do there. I imagine most of the new people don't even know they're missing anything.