I'd be using most of that on quilts. Flannel quilts seem to be the most popular in my family and a queen sized quilt takes a lot of yardage. Use biggish, easy blocks and large quilting motifs. For instance, on my first
flannel quilt, a queen sized quilt that is currently on my bed, that I quilted large
Fleur de Lis by drawing on paper and pinning to quilt, then quilting through it. I used Warm and Natural and flannel on the back as well. I believe I used about 15 yards to make it (my backing was a stripe that was directional so required 3 pieces going down the back).
I also use flannel to back all my tied quilts. That uses anywhere from 5.5 to 9 yards of fabric depending on the quilt size (I don't make crib quilts).