Wow, that is a beautiful butterfly quilt! I hope we get to see the finished project!
I have a book called "quilting in sections" by Marti Mitchell that describes several ways to quilt as you go. I haven't done a queen that way yet, though I will soon. I have tried out a couple of the techniques on smaller quilts, to get a handle on how it works, and I think it will make my queen quilt much more manageable.
There's also a book called "Reversible Quilts" by Sharon Pederson that has a good QAYG technique. I plan to make my mom a full size quilt using her technique.
There are other books, too, but those are the two I've used and had experience with.