Do you carry a brief case or large zippered folder? Are your personal belongings going to be scanned? I agree that the best place to hide something is in plain sight. A small folder can fit nicely into a pocket of a briefcase or attache then you can get to it.

What about getting an ankle sheath? I dont know how comfortable they are, but thats an option.

just my two pennies

Garrett
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On occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use. - Epictetus