I'm shooting my first wedding come September, and what I'm most worried about are the formals coming out right. The rest of it is not nearly as much under my control and the couple wants it more candid anyway, so I'm not worried about those as much. I have two flash units, a 430EX and 580EX II. So I can use them together and have at least one off-camera and bounce off the ceiling. The ceremony will actually be in a hotel in one of their large conference/meeting rooms, "hopefully" (bride's words) on a raised stage where I would be doing the formals, I assume. I have no idea what the lighting will be like, but I'm assuming the worst. With my current flashes, would spending $100 on stands, umbrellas, and mounts be worth it? Would it offer me significantly better lighting?