I also use the scrunch and bunch method. I tried rolling, but as stated above, it was too hard to move the quilt around. I also turn my machine sideways to give me more room for my hands and I start in the middle of the quilt and quilt side to side. Here is a link to the post where I have pictures
http://www.quiltingboard.com/t-52581-1.htm. There are more pictures on page 2. The quilt in the picture was a queen size with 80/20 cotton/poly batting. I am now quilting a 106" square quilt using high loft poly batting and it is going fine. Just be sure you have surfaces on both sides of the machine to hold the bulk of the quilt.
Good luck!