I sympathise
Infotraker
I live in the lake district UK, most of this is National Park but some is National Trust.
It is OK to fly in the National Park but the National Trust have a blanket ban over any land they own.
I have not encountered any signs stating no drones on any National Trust property but after a member of the public told me I couldn't fly in that area I made enquiries.
The National Trust gave the following reasons for the ban with no exceptions, Drones could cause injury to staff or the public and damage property.
I can understand the concern in some places like the grounds of a stately home but not in areas that are basically an open field.