I carry my 2nd cam with me coz i don't want to leave it in the bag and somebody steals it, i mean during the banquet. Just last week a videographer's 2nd cam kena stolen, Pana GS400 or something, pretty high-end....so it's pretty sim tia. He is using it for those "interview sessions", whereby a $100 freelance interview will be running around to get the cuts.
Somemore professional, tot he shd have known better. Also heard somebody's 2K L lens got stolen before, but that's what i heard can't confirm.
I don't even leave my ipod nano in the bag during the banquet (bag is always under the stage, but basically empty other than the diffuser and lens tissue, stuff....)