How do I make the bat wings on my model?

I'm trying to make a bat after a few months of CG Cookie. I managed to sculpt it, and am trying to retopologise it, but it occurred to me that I don't know how to do the wings. I think I can just fill it with quads like a grid, but I'm not sure how to rig it or make the wings work once I'm done with the retopology.