I feel like the question is--is your main purpose in going to get the photos, or is it to see her? If it's just about the photos, then maybe you could have her mail (or e-mail? depending on what form they're in) the photos to you. If you actually want another session with her, I'd just be up front about that, and say while you're there, you'd also like to get the photos.

It seems like you had a good ending though, so maybe it would be good to just let it be for a bit, in terms of seeing her? In which case, you could see if she could mail the photos, or, if it doesn't feel urgent to get them, just say you want to get them from her at some point, but it's not urgent.