If you have a quilt museum nearby or a university you should be able to find someone that's an expert in fabric conservation. Ask for help/suggestions to preserve them for future generations. Personally I'd attach a label to the back stating who they were made by, when and from whom you acquired them and when & who made the restorations. I'd also photograph them before and after and put the pix in a scrapbook.
Just think of all the love it took to wear those holes!! What treasures you have in each and everyone of those quilts.