Im photographing an event and they are "expecting" 1000 people to come. Whether that many people are coming or not is still unknown but I figured I should prepare for the worst. On top of that I will have to shoot in a dark gym. I've read the strobist blog post about shooting a group in a gym, but I don't know if the same setup can be applied to 1000 people. Just wondering if anyone have shot this large of a group before and if u guys can give some tips.
I have a 5d, renting a 1dmkiii, 580ex, 420ez?, abr800. The lens I was planning to use was my Tammy 28-75 2.8 or the canon 17-40 4.0 L.
The largest group I shot was about 300 people outdoors under shade. No flash was used.
Thanks in advance.