TenneseeSuze-----I used to get donations in MD from my guild. I was in charge of charity quilting. When members saw how many quilts I made---they started cleaning off their shelves.
In Phoenix it is sort of the same way. I also belong to a large charity group that has a huge amount of fabric. They are affiliated with a large church. Families find them somehow and donate fabric and other sewing things. We weed through all the donations and find homes for everything--sometimes just the Salvation Army. The church provides batting for the quilts donated through them.