I've worn in public a few times, usually with a floofy skirt on top. When I do wear, it's cloth, but I don't wet them, so I don't have to worry about smell.
One time I wore to university and was called to the front in a lecture to present an assignment to the other students, that was pretty nerve-wracking. Usually I wear a onesie on top of the diaper so there's no chance of the waistband showing, but on that day I had decided not to, since my skirt was supposed to sit higher than the diaper. I'm pretty sure no one saw anything, but it made me nervous all the same, especially since I had to stretch a little to write on the whiteboard.
I have some thinner and some thicker inserts that I can combine to my liking, so if I go out diapered I'll usually choose a thinner insert. Though a skirt does conceal a lot of bulge. It makes me a bit sad that dungarees make a diaper so obvious, even if they are loose fitting, that would complete the Little feeling.