First show nerves (20 characters)?

In 2 weeks I will be taking Angus to his first ever show, I have no idea how he will react to this. Before I got him in January the only time he traveled was when being sold. When he gets off the box after a journey he is quite roundup/bolshy/nervous/excited obviously making him a bit hard to handle. So anyone got any ideas how to calm him down so he is reasonably sane for the show? There will be nowhere to lunge/turnout/stable at the show ground. Only intending to do one class (Inhand showing), and will probably take his tack in-case he is perfectly well behaved and also do the ridden showing class.