Nice setup, and it's roofed which helps since that keeps out a lot of snow and some rain. I really don't think you need much winterization at all given your description and photos, at most, maybe covering the majority of the run wall facing predominant winds, or since it sound like your husband is handy, building a few small shelters from scrap to toss into the run for winter months (which would probably be easier and can be reused for many years).We are in the corner of Maryland/ Delaware/PA line. Last year we didnt see any snow and temps normally dont see single digits here at night. It could happen but not a normal evening night thing. One side of the Run is beside a hedgerow of trees which protects it from bad wind, the other side isnt too bad either. I am thinking maybe putting a few bales of straw for them to get behind but they can also go in the coop.