I've made lots of wool quilts over the years, from queen size down to couch size. They've all had wool backings and regular batting, the newer ones with wool batting. I live in northern New England and love the weight of a solid wool quilt in the winter...it means I can turn the heat way down at night and save a few bucks on the oil bill!! :lol:
I get wool from a local mill store at an excellent price, do not prewash it, and do not make any adjustments to the planned pattern just because it's wool. Wash in cold water on gentle cycle and they will neither shrink nor felt...no need to use blends for those reasons. Never had any problems at all and some of the quilts are going on 40 years old.