try thursland hill farm thurnham lancaster, we have a 26 footer and no problem, chickens and ducks wander round, a pet turkey and horses and you can watch the parachutists coming down as well
There's one near Salisbury with Alpacas - not sure of the name but I am sure you will find it easily enough with a bit of googling. Caravan club site I think.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.