I made a bag to store them. I'll take a picture of it and post tomorrow.
Basically I lay down one wall hanging, layer a piece of muslin, then repeat.
I roll them and put them in the bag. They don't get creased on anything. Also I put a strap on the bag so I can hang it on a sturdy hanger and place it in the closet. I think it works well. Some of the ladies in my guild want me to do a workshop on it.