Not sure, I only know one other pagan in reenacting, but then, there are only about half a million or so pagans in the USA.
And yes, its most associated with Wicca, but that doesn't mean its only a wiccan symbol. Wicca is just the most "popular" of the neo-pagan religions. I subscribe to some, but not all, of the Wiccan doctrines and practices.