You don't have a clue what the ANWR looks like. Those supposed photos of it from a few years ago are total propaganda. Very little of it is mountainous and wooded. Besides, what drilling that was proposed was to taken place on a barren landscape with rig on insulation pad for little to not damage to the permafrost.
My understanding is that due to the remoteness of the location and the miles of tundra surrounding the location, the site will only be accessible in the Winter when everything is frozen.