I have been out of active photography for some years now, I have been asked to take some pictures this weekend for some friends. The venue is a large hall, high ceilings, and low ambient light. The couple will be dressed in their wedding attire (white dress and Tux)etc. I will be using my D300 and SB900. Any pointers to a successful shoot will be appreciated. Diffusers, white balance etc. | am not a novice but health problems have stepped in so any help would assist.