I have been to my share of on-campus move in days: as a resident, as student staff, and as professional staff! Though it may be extremely stressful, there are some things that you can do to help make the day run a little more smoothly.
Know your time. If you are a freshmen, you may come at a different time and day as an upperclassmen. Be mindful and respectful of that. If you come before your time, it could throw the Housing staff completely off. The schedule is there to have things run as smoothly as possible.