Hi everyone, but hopefully all of you had wonderful holidays and didn't gain as much weight as I did....
Kristi, my first thought when you described your bed was to erect a cold frame of sorts over it for the winter using straw bales around it and either putting old windows over them or even sheet plastic. That would give you protection from both frost and some from moisture.
I remember Palmbob describing his plants when his area of California had an extremely wet and cold winter. I seem to remember it raining for days on end. He was surprised to find that some of his less hardy plants that were exposed to a lot of rain and cold survived just fine because they had *perfect* drainage with almost no dirt.
I do know that plastic as a cover is a no-no if it touches plants.