Realized I forgot! to follow up here.
Our garden walk had four visitors.
Two of whom were my next door neighbors.
I gave zin seeds to the other two and will indeed give the rest of them away, just not sure how. In any case, the garden walk itself needs to be better publicized if it's going anywhere but I don't know that I will get involved with that. Meanwhile, we are thinking about siting a Little Free Library at our house. There is one design that has a separate box for sharing seeds and recipes, as well as books. That might happen.
http://littlefreelibrary.org/