I am shooting my first wedding on the 22nd of May. It's for my cousin, who asked me to shoot it for her. I told her I wouldn't take any money for the shoot (as it's my first). I recently bought a 430ex II and I was wondering if I should leave that mounted on my camera during the ceremony, or should I order a pair of Cactus V4's so I can use it off camera on a stationary light stand? I'm shooting in a large room with 12 foot ceilings. As far as my flash goes, I have no diffuser for it. Perhaps I should order a Sto-Fen? Or a GFong Lightsphere? Anyone got suggestions as far as that goes? Between my girlfriend and I; we have: 2 Canon T1i's Canon 50mm f/1.4 Canon 50mm f/2.5 Macro Canon 70-300mm f/4-5.6 and two Kit Lenses (one with IS, one without) Canon 430ex II We're both going to be shooting and moving the entire time.