Last night I packaged everything up in the trail camera lunch box and gave it the first outdoors test. The first thing it captured was this little guy!
I think there may still be a few things to sort out. The PIR sensor may not be very sensitive or the code may not be 100% functioning correctly (though it seemed to be in all other tests I ran indoors), as the videoing stopped before I would have thought it should. However, as the very first thing it captured was the hedgehog I am very pleased with the result!