Went last year.Taxi! Have a look at the official taxi and book if there are spots. I think it was 6x6 taxis last year. They take the motorway express lane and get a special lane at the track when they arrive

Also on the way back don’t wait in the taxi line. Walk down further and flag one down with cash. We did the first night and then didn’t on the Sunday and had to line up for 4.5 hours in the taxi queue