Maker Ruben van der Vleuten has just published a very cool video showing a recent experiment he conducted on the process of a package being shipped from point A to point B. I am still unsure of the legality of this type of thing here in the US, so beware if you attempt this yourself.
Ruben did not document the electronics very well, but from what I can tell, he used an Arduino to build an intervalometer, that would trigger the camera to take a photo at regular intervals. If the package stopped moving for a period of time, the Arduino would only trigger the camera for three seconds every minute to prevent an excess of dark / duplicate frames.
Finally, Ruben very cleverly hid it all inside a very inconspicuous brown box. He tackled the task of hiding the camera by drilling a hole smaller than the size of a pea into the side and masked it by writing his name in black permanent marker around it. This camouflaged the dark hole leading to the camera lens. As an avid Maker myself, I tip my hat to Ruben for a simple, yet awesome project.