I know that here in Columbia SC where both FedEx and UPS have significant distribution centers they have holiday temps to both help both in the sorting and delivery. Instead of just a driver, they will have the driver and a helper. I suspect this too is common practice. But as you may remember both these jobs can be fast paced and require one to be in good physical shape.
2016 Newmar Bay Star Sport 3004
2015 Jeep Wrangler 2DR 4WD Sahara, Automatic, Hard Top