Last year, I was the head cook, so it was my final decision mostly. My wife has done presentation for our comps.
This year, we're trying something different. I'm in charge of ribs and brisket, and my teammate is in charge of chicken and pork. We try to agree on rubs beforehand, and methods, but ultimately, we're individually in charge of different meats. I'll do anything butt, too. For fire watching, we take turns, cleaning up, too. If we have helpers, they're a huge help for doing parts of all of the above. I also do the time planning to make sure things are on at the right times. My wife will be in charge of all presentation still.
Then I'm hiring locals for breakdown.. I wish! What an idea, though... If you're putting on a comp, try to get a local church's teens or a high school to volunteer kids to help with breakdown... As a team I'd be glad to donate $20 or so for the help.