Arbor Day, any mulberry trees giveaway?

So I was at the arboretum festival today and they were giving away FREE tree saplings. Turned out to be only evergreens. I inquired about mulberry saplings, and guess what the lady said to me? "Mulberry trees? why would you want that? They have these fruits that stain, drop all over the place, and the squirrels eat them and make a huge mess. They are very invasive!"
 
I said, I want them for silkworms. That shut them up.