I think the biggest thing is that, as you said, there's a consideration for what's happening in that given environment. Whether you're ready to back up to a chute and load or you are just turning in and backing up, now your day has started. All of these factors are important.
Perhaps you load as a group, so if you're going across the border, you need to cross the border as that group. If you have to load with another group of people, you're waiting there for 45 minutes or however long it could be. You might be the first person there, so your day has already started and you're an hour into your day now.