Campbell, whose best result for 2012 is a tie for 11th at the French Open, reeled off six birdies and a bogey to be seven shots back from South African Brenden Grace who opened with an incredible 12-under 60 at Kingsbarns.
Campbell has fond memories of the Home of Golf after almost winning the Open Championship there in 1995.
On the web.com Tour, Steven Alker and Tim Wilkinson are struggling at the Neediest Kids Championship in Maryland.
Hamilton pro Alker has carded a three-over par 73 at the TPC Potomac at Avenel Farm to be in a share of 94th place.
Manawatu professional Tim Wilkinson also carded a three-over par 73 to be in the same position.
Over in Japan, David Smail and Gareth Paddison are off the pace at the Canon Open.
Smail, who is currently 52nd on the money list and needs to finish inside the top 70 to retain his card, shot a three-over par 75 to be in a share of 85th place after round one.
Wellington professional Paddison, who is making a rare appearance on the Japan Golf Tour, also signed for a three-over par 75.
The Kiwis need a low number tomorrow to make the cut of the Canon Open.