I'm still experimenting with how to carry in various states of attire.
Last week I travelled on business in a business suit. I wore a "fanny pack" specially made for carrying:
http://shop.sportsmansguide.com/net/cb/cb.aspx?a=346231
I have no affiliation with this vendor whatsoever.
I carried my full sized 9mm HK USP in it. It concealed well under my buisness suit jacket. It was perfectly comfortable, and even with my jacket off, I didn't draw a second glance that I am aware of.
ThunderWear/SmartCarry are way uncomfortable to me.
I also feel fine carrying my Ruger LCP in a right front buisness pants pocket inside a DeSantis Nemesis if I want to avoid the fanny pack.