The following day Drysdale and Martin will race, along with an international field, in what is being billed as a rematch of their epic Rio Olympic race in August.
In a stunning single sculls final on the Rodrigo de Freitas lagoon in Rio de Janeiro, Drysdale, 37, held off Martin in a tense finish which was so close that the electronic television monitor initially gave the race to the 28-year-old European champion.
After photo-finish analysis, it was revealed Drysdale had won by half a bow ball, with both men posting the identical time of 6m 41.34s, an Olympic record.
Ms Austin said Drysdale and other rowers will spend time at the Saturday market ahead of the waka trip and were happy happy to talk with the public.
The Facebook address to enter the competition is www.facebook.com/BillyWebbChallenge.