Re: What do you do with all the flies?
Back before life got busy and I was tying a little nearly every night, I used to fill my boxes and the rest went into those plano divider boxes.
Eventually ended up with a gear bag of 4 plano boxes in the back of the car. Just about every one I knew who fished picked through them and many people I just meet.
Is a very gratifying thing to hand something like that to someone in their first season and say "Take what you need."
Oddly, I found 6 packs and all kinds of things at my car some nights. Weirdest thing I 'found' was one of those "he's a friend of ours / give him a warning" state police stickers with some initials on it.
I really like the donation idea.