In Bonnie Hunter's books Scraps & Shirttails, she says: "...and I do put batting in denim quilts because the batting cushions the feel of the bulky seams against the back of the quilt. A thin batting doesn't weigh very much so it won't add much weight to the already heavy quilt top, but it does make it a lot more comfortable to be wrapped in!"
Just something to think about.
Daffy