In 1967, Campbell gained a position on the bench of the Supreme Court of Queensland. In the late 1960s and early 1970s Campbell would meet with other Justices in Canberra when they had been summoned to various board and committee meetings and discuss various issues facing the judiciary ranging from problems with sentencing to the difficulty of persuading eminent lawyers to enter the judiciary. The issue of lawyers being unwilling to move from the Bar to the Bench remained a concern to Campbell even after he had left the judiciary and become governor.