Are you saying I should use the super thick polar fleece as the backing, then use maybe a thinner white fleece as batting rather than regular batting?
To be honest, I was looking at the quilt top more this morning and it's only the 1 inch inner border of pale yellow gingham that the blue dotted backing would show through. Since it's only an inch, maybe it will just look like shadowing, so it's safe to use no batting at all. What do you think?