Hopman is the author of a number of books and has been a teacher of Herbalism since 1983 and of Druidism since 1990. She is a professional member of the American Herbalists Guild and has presented on Druidism, herbal lore, tree lore, Paganism and magic at conferences, festivals, and events in Northern Ireland, Ireland, Scotland, Canada, and in the United States.

She has participated in numerous radio and television programs including National Public Radio's "Vox Pop" and the Gary Null show in New York. She presented a weekly "herb report" for WRSI radio out of Greenfield, MA for over a year and was a featured subject in a documentary about Druids on A&E Television's; "The Unexplained" (Secret Societies, February 1999). She is a Master Herbalist and lay Homeopath who holds an M.Ed. in Mental Health Counseling and is a founding member of The Order of the White Oak (Ord Na Darach Gile, www.whiteoakdruids.org) and its former Co-Chief, a Bard of the Gorsedd of Caer Abiri, and a Druidess of the Druid Clan of Dana. She was Vice President of The Henge of Keltria, an international Druid Fellowship, for nine years and has been at times a member of The Order of Bards, Ovates and Druids and Ár nDraíocht Féin: A Druid Fellowship (ADF).