Dusk is not a legal term, it's exceptionally vague and subject to varied interpretation. Nothing in the code keeps a person from recovering an animal after legal hunting hours, when shot during legal hunting hours; nor packing an animal after legal hunting hours. What helps establishing the animal was shot during legal hunting hours, in a legal, compliant with tag location is the documentation process, i.e., pictures and video.
The idea that you can't recover and pack an animal that crosses into another public unit to die is (ridiculous) in direct opposition to the laws requiring one to take all edible meat and our wanton waste laws. I mean, during early season, and some years, much later, overnight temps alone can spoil meat if left overnight. As such, it is necessary to recover the animal, meat and transport it so it can be cooled.