The north facing slope is a good place to start, but as far north as you are I'd say any where from NE to Western facing slopes would be good. Look for areas of the hardwood forest that contain maple or poplar trees. Also you need to familiarize yourself with companion plants such as maidenhair ferns, cohosh, jack-in-the-pulpit, goldenseal, wild ginger etc. If you can find several of these companion plants near the maple and poplar trees, chances are good that ginseng may be growing nearby. Good luck to you.