I've never been to a photography workshop, but I do know that art workshops come in all different shapes and sizes. I asked a photographer if he'd consider doing a workshop and he said no, because there are so many different cameras, and beginner level people need help understanding how to swap out lenses etc. and that isn't what he would want to teach. Sometimes you wouldn't know where to begin on such a thing. Michael Forsberg is going to give a talk at our art association in a couple of weeks, and I know it will have to do more with conservation than photography since he already gave a brief talk at his reception, and it had more to do with conservation. Not that there's anything wrong with that, but I was told Robert Bateman gives conservation lectures rather than painting technique tips.
I rented a video about photography and it was taped at the Triple D farm where they have the wild animals you can shoot. I don't remember how much information about actual photography I gleaned from it, since it was about this guy setting up his camera, trying to stay out of anyone else's shot, keep anyone out of his shot etc. which doesn't help me when I'm by myself.