There's no family passes, just single tickets.
Food and drinks are very expensive at the show.
Take something with you if possible.
If you plan to stay till late for the fireworks then dress warmly.
Showbag hall is a rip off but the kids love it. Goes without saying.
Kids also love the shooting galleries, golf games, clown games etc.
Gets expensive using the coupons, some places accept cash for these.
Live animal section is great for the kids, they'll have fun in there.
If you drive, try and park as close as possible to the entrance of the show.
Also pay for the car park once you get there cos later when you leave everyone else is trying to pay too. It's a flat fee so better to pay ahead.