Thanks ladies.
Anne, I have all my blocks/sashing/cornerstones joined in 4 sections of 3 rows each. (Took individual pics before). I was going to do the backing all in one piece but decided to do it in sections. I'm procrastinating because I'm not sure how to do it. I had the sections all layed out on the bed and it looks like a quilt!!! Hopefully this week-end I'll get DH to help me get the backing unrolled and folded neatly so I can start. That's a 2-person job. I'll leave enough extra to add the inner and outer borders. That's my plan; if you guys can suggest anything to make this easier, please do!