You know, when I first started carrying, I was like most folks. I worried about concealing the firearm. I tried all sorts of uncomfortable ways to "conceal" a handgun. Then I realized a couple of things.
First, the vast majority of non-gun folks never even think of looking for one. If they see some sort of bulge, they are more likely to think colostomy bag than gun.
Second, depending on where you live, concealed may mean simply "out of sight". So if you do "print", you aren't in any sort of violation, and if you do, most folks think colostomy bag.
These days if I carry on my waist, it's in a crossdraw OWB. As long as it covered, I'm not worried. And, over thirty years of carrying have proven that to be true.
However, much of the time I used to use a "fanny" pack. So gun type folks will say it screams "GUN". But, that's only to gun type folks. Most just think "gee, that fellow is, way out of style / really old". These days I use a versapak or similar.
And yes, cops have sometimes given me a second glance in any configuration I used. But, since permits aren't that common here, I generally get a knowing nod if anything, and everyone goes on there way.
There are two things to remember. One if you don't act like a paranoid fool, or keep grabbing your gun, most folks don't have a clue, and those that do figure you're doing nothing wrong. The other is relax and don't make a big deal out it. Life is way too short to sweat the small stuff.
Of course, the holster makers of the world will try to convince you that their products are the only way to "conceal" without been spotted, but most of their verbage is just hype to buy their products.