I agree with Holice, repair them first, even if all you do is hand stitch a piece of cloth over the worn places. I recently read the thread here where you should (nope I think it was Antiques Roadshow) roll the quilts with the piecing inside and cover it with a white sheet or make a white bag for it. It helps to keep the weak places from stretching and corners rubbing the threads. What a lovely thing to receive, someone made them and that makes it special.
Blessings, Ruth