I've shared about bathroom before, I just kinda decided that's what I was going to do. I'd only been on e for like 2 months and was just wearing dark sweatpants but I was masking all the time then and I have long hair and wear a cute hat. It was an office type building so the ladies room didn't get much traffic. After the first time I realized I needed to be sitting down on the toilet. When I started doing that at home i realized that standing was actually dysphoric.
As for dressing room etc, actually I hadn't had any experience with that till this camping trip. I've now used the shower in the ladies room twice. There's only one and it has a curtain. The first time I went, I was definitely worried. I get these negative thought loops about what someone might say. There were a couple other ladies in the bathroom but they didn't really see me. I kept my butt towards the curtain in case it accidently opened, and I called out asking if they needed the shower which probably wasn't necessary. I self trained my voice before starting to transition so I am pretty comfortable with talking. The second time in the shower I was alone. It was awesome.
I think I am very lucky to be in a blue state in an area where generally people are affirming. Maybe I pass better than I think or maybe I been lucky. I know it's much harder in other places in the US and my heart goes out to anyone in a bigoted state.
My advice is to be safe. But if it seems like it could work, don't be afraid to try. If it's a facility with a manager or something, try talking to them ahead of time to see if there's ever been a problem. Of course, that means potentially outing yourself to a person of authority in the area.
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