Whoops. Andy, I must admit to only looking at the first 3 reports on the summit page, none mentioning obtaining permission and one mentioning NT land. It isn’t NT land.
Actually if you read thee whole thread from 2010 the reasons for the actions of the wardens are reasonable. Print the old thread out and take it with you in case you are approached and have failed to get reply from the authorities.
And as I said, low key away from the public is the way to do these places where there are lots of people.