My thoughts are to consider greenpeace a media production company. Coordinate a b-roll shoot under a pseudonym to access the property, stage your shots and leave. There’s no footage of the activists getting arrested on the story this post links to, and the fabric clearly isn’t oil drenched, it’s just “oil-black” (I. E. The name of the color, not the state of the fabric)

Greenpeace gets their marketing materials and the estate gets some cash.