Yeah, I would say the dude in the headband is a soundman. maybe if we can figure out who is on the crew on that elevator, they can lead us to the teams. After all, their cameras have to be aimed at someone.
I have to believe that there are more teams than this, probably farther behind. The blogger saw 6 teams, and assumes its the final 6, but filming just began on the 22nd of April. The girls told her it lasted a month! Thats just me though, I could be wrong.
EDIT: Kiwi's right, not the young blondes. One has dark hair on that F/F team. I was thinking that with matching t-shirts they are either best friends or related (sisters?)