The Cloncurry Cup is a qualifying heat for the $200,000 Country Cups Challenge Final over 1600 metres at Doomben on December 2.
Speaking post-race on Friday afternoon at Cloncurry, Denise said she would not commit to heading to Brisbane for the big dance with the bay gelding.
"He has been in work for so long," the top country trainer said.
"We will see how he goes, but I will not be making a decision just yet."
Vigorous Flow has now won three races for the Ballards after previously doing his racing with the Snowden camp in Sydney until the middle of 2022.
Cloncurry and District Race Club Secretary Harry Evans said their annual Cup meeting was always a big event for the local community in the North West.
"We are proud to have one TAB meeting every year and it brings a diverse crowd to the town of Cloncurry," Evans said.
"It gives the club the chance to promote our town of Cloncurry.
"It is important to spread the message of our town to people around the country and overseas with the TAB meeting being broadcast around the world."
It was the Ballard show in the feature races on Friday at Cloncurry.
Keith's son Dan claimed the Country Stampede qualifier aboard the Tanya Parry-trained Wicked Wiki.
Wicked Wiki can now progress to the $105,000 Country Stampede Final at Doomben in December.
Through four races on the program on Friday, the Ballards had ridden three of the winners - with two going the way of Dan and one for his old man.