Besides looking at the ytca site you can also pull up show entries on infodog.com:
Results (lastest show results) and look up who was showing. But Mary is right, just because they entered a show in NC does not mean they live in NC. And handlers that show for others, travel and show all over. You can search past enteries by going back as far as you want and checking.
Best way is to go to the shows and meet. I know it takes time.
Best of luck.