I live in a no-carry part of the world, but I am allowed to take a gun along while hiking my own land. The 3AT is my first choice.
Next time you are at the mall, have a look at the 'cargo pants', the ones with the big flap pocket on each thigh. Some of them come with a little zipper pocket located just above one of the big flap pockets.
The little zipper pocket is covered by the flap pocket, which means nothing will print. Anything you drop in there just vanishes.
A bigger gun would be uncomfortable in that pocket after a while, but I've found the 3AT is thin enough and light enough that I will actually forget it's there.