IMO, getting equipment past security and recording the show via stealth are two seperate issues. I know I'm dating myself but back in the day..............Blah, blah, blah big batteries, cables, decks, ect............ and still we would get it past security. Where there is a will there is a Ray. Oops, I mean way!
Anyway, once you get past security with what ever you bring in, and after 25 years of taping and 99.9999% being succesful getting equipment in, I'd say ccm4-v3-micro is pretty stealthy. I doesn't take up much room and can sit on your lap, under your chair or where ever and it gets you state of the art two track, too!