Was just looking at your beautiful, and wondering what I would do in this situation. I think I would split the quilt in half, right down the middle and quilt it as I would any other quilt on my longarm. Then I would sew the two half back together. I would be sure to use a "busy" backing so the joining seam would not show. I am sure whatever you decide will be best for you.

This is exactly what I ended up doing. I have it in the frame now ready to quilt. I will post a pic after I get done. Thanks everyone for your suggestions, this one seemed the easiest and fastest.