I have not come across a great deal of distinctive traditional lore about the Autumn Equinox that would distinguish it from the Harvest festivals found worldwide. It seems to have been overshadowed to some extent by the Winter Nights which we celebrate at the equinox rather than at the more traditional time of mid-November.
Winter Finding should be treated as a general harvest festival. Whichever Gods you invoke for fertility of the land would be most appropriate to invoke again at this time. We have honored Frey & Freya and Nerthus & Njord for this purpose. You can take your pick. Even more so than other holidays, a large feast is appropriate at this time, perhaps concentrating on local vegetables and grains more than meat.
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