Has anyone tried this: I want to move some of my pots with perennials and/or bulbs in them into the bulkhead opening to the basement. Would this work to keep them from freezing? There is a door to close over the bulkhead and I could add some sort of insulation (blankets or foam or such) around and over the pots if necessary. I'm new to NE so don't know if this would work or not. My basement is way too warm with the fire breathing dragon we have down there, so I'm sure I can't put pots down there!