Here's a pic of the hoop house and the smaller cold frame all covered up for the winter. We're trying the cold frame without the straw surrounds this year - just to see what happens. They say that it's the soil temp that matters, not the surround. As long as the soil is covered and gets some sun, it'll stay warm enough to grow greens and things.
I planted lots of greens in the hoop house in October, a few days before we put the cover on. They will grow very slowly because we're not getting a lot of light this time of year, but by Christmas we should be able to start to harvest out of the hoop house.
Here is a baby carrot. It'll probably be early spring when they're ready. Just after I planted the hoop house, we had 5 inches of rain one day. It sort of scrambled the seed. My carrots and radishes are no longer in rows in the hoop house. I don't think they care, as long as they have enough elbow room.