Campbell's family have been farmers in Africa since 1713, when an ancestor of his, a German-born sea captain, started farming in the present-day Western Cape. Campbell considered himself to be an African.
During the early 1970s, Campbell, a SADF captain, was involved in the Rhodesian Bush War that pitted Rhodesia's predominantly white government against communist-backed nationalist guerrillas. He moved to Mount Carmel farm in 1974. He added a neighbouring plot of land in 1980, following the end of the war and the country's reconstitution as black-ruled Zimbabwe. As well as farming, Campbell set up an extensive nature reserve on the property, replete with giraffes, impala and other indigenous animals. He also created the Biri River Safari Lodge, which became a popular tourist attraction. The farm near Chegutu, located south-west of Harare, employed around 500 people and was a centre of agriculture, wildlife and tourism. Campbell was an early conservationist, concerned with maintaining the African wildlife. In 1999, 19 years after Zimbabwe's independence, the government declared that it had "no interest" in the Mount Carmel estate, and granted Campbell full ownership of the land. The following year, however, as Robert Mugabe's land reform programme gathered pace, between 20 and 30 black men entered the estate, and refused to leave. Anxious that they might cut down trees on the estate to build homes, Campbell gave them a shed to sleep in. Over the following decade, invaders gradually took over Campbell's farm; they burned down the safari lodge and farmstead, and killed all the cattle and wildlife on the farm. Malaria then spread into the region and killed 11 workers, as well as Campbell's pregnant daughter-in-law. Hundreds of Campbell's workers lost their jobs. Campbell's farm manager and other workers were arrested and tortured by the police after they attempted to defend the farm. Campbell and his wife and son-in-law were also violently assaulted when they returned to their estate while their trial with the SADC was in process.
Death
Campbell died at his temporary home in Harare on 8 April 2011. He is survived by his wife Angela, his children Bruce, Cathy and Laura, and 6 grandchildren. Campbell's family stated that he died from complications of the 2008 assault.