So where did you get the idea that you cannot donate photographs without the copyright holder's permission?
If you legally own the photos, you may give them, sell them or destroy them as you please. You may not copy them or change them. (Or maybe you can change them - that really opens up a whole other can of worms.)But you can certainly donate them. If this is the level of your knowledge of copyright, then I'll get my information elsewhere.
Donation of Copyrighted Work