The past few years the South Pole Antarctic base has gotten most of its supplies via a tractor caravan that travels from McMurdo Base to the Amundsen-Scott Base. The five vehicle caravan is manned by 10 people and takes about a month to get to the South Pole as it travels 12 hours a day at 5 MPH. The robotic idea is to most use robots and a team of only 2 to rotate 12 hour shifts to keep the caravan moving 24 hours a day to make the trip faster and more efficient.
Personally it seems a team of 2 splitting shifts is not exactly ideal either. I would think it would make more sense to have two teams of two if they are going to constantly have the caravan going, as otherwise each person would be spending most if not all their shift alone as the other person sleeps. Just seems it would be more efficient or they would have to seriously seek out the exact right two people even more particular than making their team of 10 work effectively together.
Read more about this here.