I don't know what kind of pants y'all have, but deep CCW guns are about 2 things:
1) what fits in your pocket or belt without printing
2) what can you shoot fast and accurate with
I'm in the same boat as AK. When I'm not at work, where carry is strictly prohibited, I 'deep' carry a CZ-75 Compact AIWB in t-shirt and shorts. You can draw at least as fast as someone pocket carrying if your both starting with your hand off your gun, and I've got 14+1 rounds on tap in a gun with a decent sight radius that I can get a full fingered grip on. I don't size up my pants either, and my t-shirts aren't super baggy. I've hugged family members at gatherings who never had a clue I had anything. Only my goofy sister found out when she, as usual, tried to gut punch me.. siblings! I did the research, and made sure I got a super low profile, purpose made Kydex AWIB to be able to carry the size gun I wanted in total concealment. It would be even easier than it already is with a slimmer single stack poly gun, but I love steel CZ's. It's not that I would feel 'undergunned' with a J-frame, it's just that I figured if I can conceal carry a larger gun effectively, and relatively easily, then why not. In terms of having to actually USE the gun in any deadly force encounter, a 'Compact' size gun in the general Glock 19 size range, like my CZ, doesn't lose ANYTHING to a j-frame, or mouse gun. It ONLY has advantages. As much of a longshot, God willing, as using it may be, it's nice to have those advantages on tap.
Don't automatically overlook carrying a gun in the 'Compact' and even 'Full size' range, like AK's G17, for deep CCW. With the right holster/gun combo, and the right build of person, it's very doable. Everybody these days seems to be in a race to carry the smallest, lightest, and usually least capable, gun possible without thinking that a larger gun is even a possibility. Just my OP.