Actually that's not entirely true. I visited Winston Salem via Amtrak. On the transfer point, an elderly white gentleman approached me on the train platform. He was very friendly, genuine southern hospitality at work. He eyed me up and down, smiled, then approached me, still in suit and tie coming back from interview.
"So there fella, what kind of Oriental are you?"
"Hello...I'm Korean, heh South Korean."
Still smiling then looking at my suitcase.
"So you got some kimchi in there?"
I guess the real point is whether or not you feel like explaining yourself to people who are friendly, curious and just plain clueless about your "group."
It's just that in areas where there are "more of you" to go around, the friendly people know better than to ask such awkward questions. Bigots are present everywhere so they'll always hate you, but at least the friendlies aren't going to unintentionally recollect every stereotype they know in order to find some common ground.
Edit: To be fair, that gentleman was only one blatant example I encountered in a three day stint.