Why do you think you either have to tell or cover up?
I mostly use diapers at home & when I'm alone, which minimises the "risk" of someone finding out about it.
However, a few times I've hung out with friends while wearing, or even had surprise visits from friends/family members a couple of times, and only one friend has ever noticed.
Here's the deal: People generally don't look at your crotch.
If you wear jeans that aren't really slim, they won't notice unless they are purposely looking for it.
Sure, it might crackle as you sit down, but I promise you that you're the only one hearing it, or at least the only one noticing & thinking about it; unless of course they are purposely listening for it.
When my friend found out it wasn't the first time I wore in front of him, and he didn't actually hear nor see me wearing.
He came over to my place unexpected because there was something he had to talk about, and so we sat in my kitchen smoking a couple of cigarettes and talking for maybe an hour or something when he had to go to the bathroom. And I had simply forgot to put away my diapers so they were just laying there on the bathroom floor.
If he had found out about it a couple of years earlier (when I was insecure & actually cared about what people thought) I would have told him I was incontinent out of fear. But luckily I had stopped giving f***s.
So he asked me about it and I told him straight up that I enjoy wearing diapers, and that's it.
He said he felt kind of embarrassed and that he didn't know why he asked because it was none of his business, but I told him not to be because I personally didn't give a damn at all. He asked if I was cool with him asking a few questions, because he was curious, and I told him it was alright.
So he asked me a couple of questions like if I'm wearing right now, to which I said yes and that it wasn't the first time while hanging out with him.
We kept talking a little bit, and suddenly arrived at the most important part: He asked me why I was wearing.
The reason is simple. I wear diapers almost every day for the same reason my aunt is drinking beer every day, or the same reason my mother is knitting every day, or the same reason my brother is playing guitar every day. It helps me relax. To me personally, there's nothing weird with wearing a diaper, or knitting, or binge watching Breaking Bad if you feel like it pleases you. We all need to relax sometimes, and some things just helps us better than other things.
He also asked me if it was sexually, to which I replied "no".
Now to be honest it actually is a little bit sexual, but the reason I didn't tell him though, is because I don't believe anyone except the person I'm in a sexual relationship with has any right or reason to know what pleases me sexually (or of course you guys but you don't know me AND you're also into it in one way or another). Besides, it's not even remotely as sexually as it is relaxing. I'm not putting on a diaper just because I'm horny.