It's wonderful to hear of quilters getting together.
Our local library was built just a few years ago with a "Quilt Wall". A very nice quilt clamp was installed near the top of the wall, and the quilts are changed about once a month. The quilts come from anyone who wants to put one up there. We just check with the librarian. They have come from many miles away, but most are local people. Our quilt group has now been asked to get their names on a list if they wish.
Instead of donating a quilt to the library, why don't you ask them if they could put up a quilt clamp. I'll bet you would have no trouble lining up quilts to go up there for one month at a time. And what a nice thing to bring people into the library.