I certainly would be overwhelm if someone came by my small apt with 50 yards of fabric. I have recently joined a group of sewers that are affiliated with a church organization that does lots of charity works. We are currently making snap bags. I am letting go of some of my stash that I know I will never have any use for.
I would sort through the stash received and pass on any fabric you know you will never use. There are so many charity groups that would be delighted to have your donation. Don't get yourself in a corner being overwhelmed with what you have.