Just a series of comments that come to mind...

Women in the cab unlucky? Certainly. They're a distraction. There is always some Bozo who wants to flirt, and while flirting he's not paying attention to his duties, and THAT could get everyone killed. Eventually social pressure forced acceptance, but back in the steam era there was no pressure to accept this risk.

Restroom facilities? I grew up in the construction industry, not railroading, but I can still remember my Dad carried a roll of toilet paper in his toolbox... all the carpenters did. If you needed to crap, you found an empty nail box and took it off in a corner somewhere. Need to urinate? Even I am old enough to remember the lectures, "We have portable toilets now... Anyone caught pissing on the walls will be fired." This was in the early seventies.

This spilled over into railroading... I recall a published story about the DSS&A where the superintendent wanted to promote a woman to a yard clerk position. All the carmen objected, because when they needed to whizz, they just let fly... it was accepted practice. The compromise reached is the woman got the job... and a whistle, which she had to blow repeatedly anytime she was out doing a yard check, so the men knew she was coming. This was late fifties, early sixties.

Some women clung tenaciously to their wartime jobs. I recall when I was a kid in the fifties or early sixties, an interview on TV with a woman who was retiring as a crane operator in one steel mills. She had gotten the job during the war and never left. The fact that this was newsworthy speaks to how rare it was.

The 'woman engine driver' picture is interesting. What little documentation I have shows engine #11 as a baldwin 0-4-0, and the picture certainly seems more like a steam than an electric locomotive of the type the Bush Terminal knew in the WWI era.

There is no record of an electric #11 at all, and I couldn't find a picture showing the 'rest' of the steam locomotive with that number.

The alternative solution is you just dispense with all the prudery about nakedness and toilet activities. Here in northern Europe the culture is completely different, and there is not the same level of privacy between the sexes, and it is pretty common to see people urinating by the side of the road, etc.

I would hazard a guess that this is the Mt Tamalpais

Yes, Mt. Tamalpais in Marin County. And these are ladies out on a day trip probably with their husbands.