We did Backstage Magic...
We were not allowed to take any pictures backstage except when we were in the topiary greenhouse {and in there we were told not to take any pictures with any cast members other then our tour guides in the shot}
When we were 'On Stage' {Lunch and the Main Street portions of MK} we also were allowed photos
Yes, you can take photos in any "on stage" area (which in Behind the Seeds includes the part where you're in the greenhouse that the ride goes through). They will very clearly tell you when you're entering a photo-restricted part of the tour.
Okay. Good to know. If we weren't allowed to take any pictures, I would just leave my camera in our room but I will take it along for the shots we are allowed to take.