What illegal shit have you traveled with?How do you conceal it?

Me? All kinds of it. Lock picks wrapped in film in cameras that go through all kinds of places, DIY gun kits in camera bags and pet crates. Necklaces that are usb cables with the cross as a USB DRIVE. Knives in my hair. Plastic wrapped knives and swords in my clothes lining.

I was a mercenary and none of this was illegal as it was govt sanctioned but it would have been a big hassel to bring through discreetly.

Also, when traveling by car in europe I used to keep gas in water bottel mixed with diodes(restrictions against gas differing in countries.)