Checking in from SFO, same deal as post #19, small tripod in the carry-on, 2x3" Tech V kit in an Urban Disguise 50 bag, no checked luggage, and no problems checking in. They gave the camera bag a sniff with a handheld detection device before it went through X-ray, but other than that, no special attention. I think the fact that the Urban Disguise bag looks like an ordinary laptop bag helps.