Living in the desert southwest, I carry under a T-shirt most of the time and really don't worry if my gun 'prints'. Since I'm a retired LEO I'm pretty much okay to carry anywhere I go, and fact of the matter is most folks are clueless anyway what with their fixations on their cellphones! I think this article might be a little tongue in cheek but it's still a good read!
https://www.gunsamerica.com/blog/5-dead-giveaways-that-out-concealed-carry/?utm_source=email&utm_medium=20160411_BlogDigest_167&utm_campaign=/blog/5-dead-giveaways-that-out-concealed-carry/