Campsites

Does anyone know of any campsites that takes groups and allows bbq's / camp fires -we don't need anything fancy- even a farmers field would be fine. I have been trolling the net for about 2 week looking. Counrty Parks we have phoned don't allow bbq's - Tried Hooton Lodge but the people are really rude and want £10 per person per night for a tent. So for a 4 man tent £40 per night. Thanks