First, that suit suits you. I like how you can change the snaps and make a whole different look.
I have done the one piece a few times when staying at a hotel at a hot springs. I was there on business and didn’t know anyone and didn’t care what people thought.
I also tried a tankini at a crowded beach over the 4th of July holiday. My thinking was that there was way to much going on that I could hide in plain sight. It seemed to work. Swimming in the lake, keeping my wig out of the water just felt right. No problems that day, and I didn’t stay long enough to get any tan lines that would be difficult to explain.