First, in my world it is too hard and expensive to work against nature so my approach is to perhaps modulate the extremes and grow appropriate veggies. Here is what the low tunnels looked like last fall.
They have rutabagas, kohlrabi and beets in them.
Where I am one must consider snow loads.
In the background is the high tunnel, containing cabbage, celtuce, cilantro, lettuce, chard, spinach, kale, celery, scallions, dill, carrots and various experimental plantings.