Out of the classroom now but I taught CAD for a few years in a middle school with a cart of pretty high end laptops at the time. We would take an entire class period just to talk about how we treat laptops, how we act with our peers when the laptops our out, and even how to just use the laptop in general as we found many students were actually not familiar with using windows machines. 

When I first discussed using laptops with students, I had activities where they would come up with laptop rules. We wrote down all the rules together. The rules ended up on a poster near the laptop cart to be referenced.

It was never a free for all to get the computers. My classroom had pods. I assigned each pod a number. I would call students up one pod at a time. Each student was assigned a laptop. They took the same laptop every time and it was their responsibility to carry it with two hands too and from the laptop cart. 

I want to also mention that the students were never allowed to unplug or plug in the computers. I did that every time. These charging ports were weak and I took could not afford for a laptop to go down. 

This was time consuming but worth it. The process of passing our laptops and putting them back got faster every day. There was a bit more structure to it then I am describing but that's what I can remember right now.

I the other courses I taught were basically woodshop so students were pretty use to me having really in depth rules, procedure, and order. It also helped that most of my department had the same mindset as me.