My first time attending but I thought it was all really smooth.
I went on the Saturday, got parked by the gate, had seen the guest I wanted to see (John Barrowman) by 9:15am and photo was done by 10:40. Went to the shopping centre for a couple of hours browsing, came back parked by the gate again and picked up pic that was all ready and first on the desk.
... then again I did arrive at 6:30am!
The only downside was I was pretty drenched waiting in the rain until the crew, who were really friendly, let us in to the entrance an hour early to get us out of the rain! Can't blame Showmasters for the weather.
G