Using a flash bracket, you can get solid flash photo. When there are lines of people in 3-4 ft deep try a different technique--bouncing flash light to a low ceiling. I would also maintain F8 (to F11 with tripod) as 90% of the indoor shooting. If you have the luxury to rent a lens, I would rent the 35-70/2.8D (60% shoots) or the 20-35/2.8D (20% shoots). They are my favors. (The other 20% will be with a tele-zoom.) Regardless of the gear you will use, do a dry run with a roll of ISO 400 on your buddy (or during the wedding rehearsal) at the place and take note of the camera setting. This way, you will know what you want on the wedding day. (or don't want): Have fun.
