Looking for secure outdoor location

[MaxBones]

Morning all,

I've got a shoot coming up in May that I require a secure outdoor location for, and am wondering if any of you can help please?
It doesn't have to be big or pretty, just somewhere where we won't be disturbed for a few hours, and that has space for a few cars.
Ideally, I'm looking for somewhere in the South of England, but would be happy to travel to the right location.

Many thanks
Max