To pack now or to pack later? To pack fast or to pack better? Packing up your classroom is a highly personal choice. I believe it is a choice that should be made with care.
Some administrators take early packing up as a sign of having checked out of teaching for the year. These administrators might hold strong personal beliefs about this issue. Or they might be looking for negatives to exploit. Some are adhering to or enforcing rules from on high. No matter the motive, if your administrator disapproves of early packing, it is in your professional best interest to tread lightly. That doesn’t mean you can’t start organizing and packing. It means you can’t do it in a way that would be noticeable to a relative outsider.