I don't have time for much more of this but may I can clear up a couple of things. I take pictures for a living. I'm a SF local and paid taxes in SF for 30+ years. The bridge, according to district records, was paid for many years ago. I can't always choose what photo (angle view)a client may want of the bridge. The district property is vast. There is a map at the end of the PDF doc. GGNRA has good spots for shots of the bridge. The bridge people recently threatened me with "trouble" if I used GGNRA property (that the district can't control) for photo access. I have a good relationship with the Feds amd there was no trouble..so far. The City is licensing the "image" of the bridge. Darkrooms were restricted to pro photographers. Not labs. Though most of the labs have gone. Jim Marshall's b+w printer (Kirk) moved his operation out of SF. The SF EPA will visit, unannounced,to inspect for darkrooms. One friend still had an enlarger + sink in place (this is legal) and an unopened package of Dektol on site (not legal). I think he was fined. 20 years ago, I could take a model, (in the case of the Valley this would have been a person dressed as a school teacher) and client (insurance Co. for Cal. State teacher's Assoc.) and photographed for a couple of hours and had lunch at the awani lodge with all involved, including the ranger we paid to keep an eye on us.. and we would have been done. Today, we would look for a location that looked "yosemite like", rather than deal with all the paper work.
As for taxes and GG park.I don't use the park for photos. But just the same, i can't take a snapshot of my neighbor in the park for fear, some park employee will think I'm sneaking a job in under his nose. In years past when the City asked for a freebee (symphony photo done gratis) I would help out, paying my fees and covering my assistant out of my pocket. i no longer do any free work for the City. It's a two way street. I think I covered all the questions. if not, sorry, I need to get back to paying for my taxes.
It may be interesting to Mr. Zumbido, that the client for the "bridge photo" is another city department.. One that is bigger, and with more money than the bridge district. Rather than wait months for these two city groups to duke out the money thing, and having weather issues at the time I found another way to get the photo.. this time. And remember, this is a city, with some bus drivers who earn near and in some cases above $200,000 a year. Names, places and department details in the above text may have been changed to protect the innocent..me