Re: getting permission from large company's?
Last year I attempted to get permission from Norfolk and Southern..(no-folk-in-way)...for short.
And that's just what they told me.
Liability WAS their reasoning...even tho it was unused, abandoned and tracks removed land.
I had a dog of a time finding the right people to ask...the area was secured by an unlocked, rusty, old gate (which was open and looked broken) with an access road right down to the area. There was an active railline in the vicinity and I explained at length I would not be anywhere near (

) their trains....I never even mentioned metal detecting in my request...simply an historical survey...
No means NO.
Less than 2 weeks later, I wen back to the area...just to look mind you...that detector in my trunk was stayin there...

A brand new lock and chain on a closed gate
I shoulda just shut up and been the casual hiker or hunter that frequented the old trails instead of opening my big mouth.

Just parked my car at the top of the hill like everyone else there. You know...there's dozens of em there and nobody says a hoot to them. But they never asked permission either.
Al