I just used Sharon's method for the first time on a 72" wide quilt (i think). My cutting table has fold up sides to 72". The process worked great. I haven't started hand quilting the project yet but there aren't any fold on the backing. I did thread baste the quilt.
I would say you need a table top the width or length of your quilt to use this method. If I have a larger quilt to baste, I would use two banquet tables side by side. In my case, I would spend the afternoon at our church and use their tables. Maybe even bribe a friend or two to help me.
That being said, I did like her method and will be using it again.