The 'belt and suspenders' approach.
My personal favorite. The problem with putting them in the raised bed is that the snow can still be a foot or so deep around the bed but they tops are snow free. So can't count on that nice insulation.
I have a bed that had strawberries in it that died. Strawberries not bed. I need to dry out the mix a little as it hold water rather heavily. Then I could experiment with planting garlic in the ground where it would benefit from the snow. Our ground freezes solid down a goodly ways. When the frozen earth retreats by more than 5 inches I plant seeds and some cool weather crops. I could still hit ice if I went deeper.
I had some marsh marigolds in the pond last year in a pot. I sunk the pot in one of the raised beds last fall and just covered with mulch. They started growing this spring well ahead of everyone else. The pot was stuck in ice and I slowly dug around it over days until the ice retreated enough to extricate the pot. Amazing. I bought another bunch as I am all for any plant, especially pond plants, that can survive our winter.
