I took a few test shots at 5PM yesterday, today's wedding is at high noon.
My test shots Here
I didn't use flash on my test shots. Obviously; I'll need it to compensate for the bright backlighting, but the ceiling is a slightly yellowish mirrored surface - or at least, very color-cast looking. I'm afraid of getting colored faces and whiter lower bodies.
I was thinking of letting the background be totally blown, exposing about 1 stop under, and put the flash on pretty minimal setting. Pointing my 580EX directly straight with the white bounce-card out to avoid my light reflecting off the ceiling.
Advice?
Also; undecided about doing formals on the mid-deck (the wedding nook) or on the top deck (bright bright daylight).