Yeah I'm not at all worried about the contents themselves leaking, even if the cardboard envelope were to get a hole poked through it there would still be another layer of protection before even the decoy's packaging is visible. You're right, I probably went overboard but it was kind of fun and took some creativity. I'm only sketched out by what's on outside of the box like the postage and addresses.

The post office gives you the option to buy postage without having to provide ID or even say where you're shipping to/from. You just have to hand-write the addresses yourself I believe. I've heard people discourage hand-written labels but I'm not convinced it's suspicious for some random dude mailing something personal if he writes the the address by hand.

That's funny about express shipping as the conventional wisdom in the US is that it's much more high-risk than priority or first-class. Do you need some sort of license to be able to send cannabis by mail legally? I thought it was only legal for medicinal use.