We never get the photo package because there seems to be fewer and fewer pictures we want to keep. In your case it will probably be worth it. A discount on the package is always one of the coupons inyour cabin when you board. Almost always, anyway. Whether they inflate the prices before then discount them, I have no clue. Maybe someone that has recently cruised can tell you how much the discounted price on the ship was.
Regardless, happy cruising!!