pic with Arnold is way overrated anyways. You're better off hanging out in the expo and waiting for him to come around and trying to get a shot of him there. Take an old musclemag with him on it. He'll sign it, just have your sharpie ready.
VIP tickets are the way to go, best seats, and if you plan on experiencing the entire event, and I have and would again, get them if available.
But by now, the best VIP seats are long gone.