I love all your quilts and tops!! One of my kids always tells me that quilts aren't warm enough. I just had one done with cotton batting and it's really warm!
But to answer your question specifically I have used several quilts at times when 1 isn't warm enough. I love layer upon layer of quilts but that's just me. I'm always cold! :D
I like the idea of putting flannel or fleece on the backs but don't know how to do it, either.