Thats safe transportation for avoidance of accidents. If I was smuggling this stuff, I'd use a mule, and I'd pick one who had no consciousness of how dangerous the materials were, and I'd avoid contact with them directly.

I probably wouldn't care about the crash risk: if the cleanup crew is decontaminating a border crossing down south, I can get through up north with the other 1g.

Also, if the mule dies more than 72hrs later, I don't have to bother disposing of the mule.

If you publish the airport thriller, I declare my interest (c)