Hi

Camping at the shows is advertised in the schedule and will give you exact dates and time you can arrive on site.Most are a few days before the show and a day or so after some are longer,some have tiolets some dont, but it will say in the schedule under Caravan heading it ranges from £25-45 for the duration all except richmond who are just greedy and ask for 50 60 if you dont book and the site is naff.so if you are only going for 1 night you may as well book a travel lodge you dont have to book with your entry but make sure a its not limited space like Windsor where it is better to book,you will have to pay a little more to pay on arrival again will tell you all in schedule
We camp at most showswe go to and enjoy the soical side of it and have made many friend in other breeds Happy camping may be we will see you wading in the mud
TG