Searching for permaculture garden open for tours

My family and I are traveling from west central ohio to Washington DC at the end of July and we are trying to find a homestead/property/garden which utilizes permaculture design principles to stop at and tour along the way. We are planning on purchasing land in a year and implementing permaculture design to the property. We are surrounded by industrial agriculture in our area and to find a permaculture minded person near us is rare. We are traveling from Columbus, Ohio to Pittsburg PA where we will stay for a day before heading to DC. Does anyone know of any place for us to visit along/nearby that route?