I too love your panel, absolutely stunning photos. Spoonflower does amazing work but they are so expensive. I looked into having something printed it would have cost $35.00 a yard, plus of course tax, shipping and handling. I know many people who have done basically 4 fat quarter's on a yard that was more cost effective for them.
As for the quilting I personally would stitch around your great grand daughter and the porpoise (can't think of the other name for it)! Can't wait to see your finished quilt.