When it's a paid gig, you get cooperation and a little strong-arming assistance from the people paying. After all, they don't want their money wasted. You also get respect. Sometimes.
It helps to have a huge camera with a flash bracket. People move for those.
OP stated there were 50 people with DSLR's at the event. I don't think if you told them you were getting paid to shoot would have made any difference. Everyone figures that a wedding photographer is paid but that still doesn't deter people from getting in the way.





