Spirits have no relation to magick. They are simply bodies that don't manifest in our physical world the way we do. Magick has been preformed almost everywhere, but in the time of the 1700s-1800s, when England had it's settlers sail to America, Tennessee was just used for farming. Magick isn't noted as much in it's history as others.
So really, spirits may just be curious and want to hear what you're teaching. They may have been there all along.