In 1935, Crampton was born in
Sydney,
New South Wales. He attended
Kogarah High School from 1948 to 1950. In August 1953, Crampton reached final of the
New South Wales Amateur Championship, losing 5&4 to
Harry Berwick. As an amateur, he also had success at professional tournaments. In October 1953, at the age of 18, he led the
Lakes Open after two rounds. According to
Norman Von Nida, he was "probably" the first amateur in roughly 15 years, since
Jim Ferrier, "to lead a big tournament after two rounds." In 1953, Von Nida also stated: "Crampton proves my prediction that he would become one of the greatest players Australia has produced." ==Professional career==