Brabants approached Campbell and his coach Bill Barry with the suggestion during the Games.
Athens Olympian Mike Hennessy has been coaching him in rowing, which is very different from canoeing in terms of technique, with a focus on the legs rather than the arms.
The Pairs Head features over 300 crews, including internationals, racing in a time trial between Chiswick and Hammersmith - at 4km twice the Olympic distance.
Many rowers see it as a fun event as it takes place at the start of the new season, when most of Great Britain's Olympians are still resting.
Gold medallist Andy Hodge explains the basics of rowing
Brabants has already said he plans to return to work as a medical doctor for 18 months before turning his attention to preparing for London 2012.
Rowing and canoeing will take place at Dorney Lake near Windsor, where Brabants won a sprint triathlon event last weekend.
This weekend he will be back in a canoe in Toronto in a 200m sprint event.
"I'm keeping my options open but it's more about trying something different and enjoying it for enjoyment's sake," he added.
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