Just thought I'd share my wintering experience with others in the northeast.
Two winters ago, I wintered my 6ft fig tree (wrapped up)in the non-heated garage. I took a clipping from the tree and wintered it in my office window. The clipping grew like a weed. The big tree when pulled out of the garage was all moldy. All the branches were dead, but the suckers shot up and grew pretty well (but no figs on either).
Last winter, I wintered both the clipping and the big tree in the non-heated garage but didn't cover either. Pulled out the clipping the first week of March and put it in my window at work. It has doubled in size since then. Pulled out the big tree the last week of March and placed it near the chimney of my house. It is growing slower than the clipping but coming back pretty well.
I was quite surprised that both survived the winter without being wrapped up in the cold garage. Hopefully I'll get a lot of figs this year!