I just heard Paul Peterson, from The Donna Reed Show, on KEarth101, talking about back when Rock 'n Roll wasn't the multi million dollar business that it is today.
Paul had a couple of hits, and Dick Clark asked him to be on Dick's "Caravan of Stars." The stars included Neil Sedaka, the Supremes, the Drifters, and others. They would put on a show in some town, then around 11PM, after the show, they would all hop on the bus, and travel 400 miles, through the night, to the next town.
He said the experiences of being on the bus with the Drifters and Supremes just sitting back, singing, for their own enjoyment on the bus, was just a privilege few ever experienced.