For what it is worth , here's what I'd do. I would take my white elephant along with all of my other gifts. After the exchange, I'd get my gifts for each person and I'd give them too them. I'd explain that even though they had changed their plans after I had worked so hard on their gifts that I still wanted each one to have the special gifts I had made for them. That way, you'll go home feeling good about yourself and I imagine they will be a little bit ashamed of themselves.