Nmap, ditto with TS. Would suggest TONS of practice with an empty firearm with Thuderwear before going live. The clenching actions of the human hand after a heavy adrenaline dump can be dangerous I've learned.
Enough encounters in the Dallas/Fort Worth area are ~ 5 feet so you'd better be very fast ripping your friend out of your shorts. Or in San Antonio, I guess you could push them into the river to buy some time.
People who make alternatives to the fanny pack (the owner of the notorious Pager Pal comes to mind) will bash fanny packs yet they are more discreet than you might imagine, are reasonably fast with some practice, and, contrary to popular belief, everyone does not look at you, stare at the fanny pack, and think you have a gun. I would have noticed that in the past 13 years.
Just a thought. Have more than one way to carry. Stay safe.