In my personal experience,
It may seem silly to us but considering the owners and operators and the pilot & crew of the plane were involved in an accident maybe they don't want to be scrutinized by anyone.
Consider that there are Insurance companies, OSHA, EPA, FAA, competition, the legitimate press etc. constantly looking at a company like this. When your running a company that handles heavy equipment including aircraft, cranes etc, owners and employees
I will make this very clear, I'm am speaking in generalities and know nothing about this operation, but some shops bend the rules and do things that may be questionable as far as safety or legal at times and again don't want to have every move they make potentially watched or under scrutiny of a bunch of chuckleheads like us nitpicking the color of the handles on their left handed screwdrivers.

That said they are making good progress.
That said, I have found most shops, if you announce yourself, you don't look like a cop or investigator and speak to someone who looks like they know whats going on, taking a photo or asking basic questions, usually doesn't get a door slammed in your face.
Hanging over a fence in a security area with a 600x zoom usually isn't advised

Yes, the person I I'm referring to knows who they are.
Silly as it might seem, being a part time blogger has opened many doors up as a (laughable) journalist.
Thats just my 2 cents.