"The team is very happy with him at home and I was rapt with him on Derby Day," Berry said of Caballus.
"He is the quality horse in the race, but I'm fully aware of what Hidden Wealth can do after winning the QTIS Magic Millions race on him last year. I've won three out of five rides on him, so I know how good he is and he's drawn the plum gate in one.
"We've got to overcome a tricky alley but he's a class horse and hopefully class can overcome that."
Berry is also upbeat about the Chris Waller-trained Snitska, who is a $620,000 Magic Millions yearling by Snitzel out of two-time Group champion Miss Siska.
He makes his debut in the Phelan Ready but has shaped well in two Gold Coast trials and the reports from the stable have been positive.