Also, how anal are they about the closeness of your shave? I can shave every which direction, but there's still black dots visible on my jawline despite being able to brush my hands over it and not feel any prickles or resistance. I've never gotten closer than this. After shave being a prohibited item also means that my face will be thoroughly cut-up/bumpy/generally shitty looking.
Some go by sight, some by touch. For example, in H-Class, when inspecting us, Master Chief had us take out our driver's license and run the edge along our cheek and neck. If you could hear it scratching against the stubble, your shave was not close enough. Then after I classed up, our DI handed out a few demerits to our med body, who had a few whiskers on his chin, it actually sort of looked like he'd shaved everywhere but that one spot. But it was very noticeable, I think the black dots thing is fairly common, and as long as you're checking that it's smooth, it should be fine.
Also Also, my orders state state to report no earlier than 1600 on Saturday. What exactly happens if you check in Saturday instead of Sunday?
Whoever's standing watch at King Hall will tell you to get a hotel room and come back in the morning. They won't put you up for the night, as I think the old policy used to be. So there's no reason to check in before Sunday morning. Might as well get a room at the Lodge or the Gateway, catch up with your classmates, and head to the Red Parrot or something for your last night of freedom.