I am still new at this, but much the same thing in north central Ohio. I used a couple light fleece blankets, though, without the burlap. The final wrap was a light and blue plastic tarp. Some tips didn't make it, but otherwise in good shape. the winter was so mild though, that it is not for me a good indication that I am doing things right. Nevertheless, from others on the forum and what I have read elsewhere, it is within the standard parameters. I think rob0520 has the better idea.