Need Candle Light Advice

Shamguess

Tonight I will be hanging my 5DII from the rafters at my church to get a massive candle light shot. At the end of the service, they turn out all the lights and about 800 people will sing with lit candles. I will be firing the camera using a pocket wizard. I plan to set it on manual focus and I will shoot RAW. Beyond that, I need some advice if anyone has any such experience. What should be my white balance setting (or leave it on auto and fix it later)? Should I leave my ISO low since I will be shooting bulb anyway? I have no way of testing shutter time and I wont be able to look at the images until after the service so I plan to just hit my pocketwizard a bunch of times at various lengths from half a second to several seconds. Anyone have experience doing anything like this? Any advice is appreciated. Here is what the view will look like from the camera mount:

AlbertZeroK

I'm wondering if I'm too late to chime in. Can you set the pocket wizard and camera up to open the shutter when you fire the pocket wizard, then close the apature when you fire the pocket wizard again? If so, you could get a couple shoots at different times.

Personally, I'd shoot in Av mode, maybe f/8 and ISO 400. Then the camera could do it. You could set up your camera to take 3 shots at different Exposure settings (can't remember what's this is called)

I am really excited to see how this will turn out. I tried to do something simular, time laps photography at a Robotics Tournament, but the venue was just WAY too dark.

Shamguess

So hear is the result. Just a quick edit so maybe I can get it better but I'm pretty happy with it. Ended up setting ISO to 1600 which is pretty darn clean on the 5DII. I wanted a fairly quick shutter speed because I knew people would be moving around a little. Set to f6.3. and bulb. Hit the pocketwizard from the side of the sanctuary for various amounts of time. This one was about a second.

AlbertZeroK

A wonderful shot!

pathfinder

Very nice!

amg2833

Great shot. I'm glad this was a success.

time2smile

judging by the shot, you dont need any advice

Very Nice

Shamguess

final image
This was the final image for the Church.

Nihilation

I like

adbsgicom

I really liked the feel of the first one much more. You may not have been able to identify a lot of congregants, but the feel was definitely candle-lit. The final is well done and all, but I prefer the first.