If early markets are any indication, Gai Waterhouse is set to dominate the first Group One raceday of the Sydney spring.

After taking the Sydney autumn carnival by storm, Waterhouse is poised to again make her presence felt in the major races with outstanding mare More Joyous leading the charge.

Waterhouse has runners in six of the eight events on Saturday's Rosehill program and either the favourite or second favourite in five of those.

More Joyous is at Black Caviar-type odds of $1.20 for her return in the Listed Sheraco Stakes (1200m) while Strawberry Boy dominates betting on the Group Three Kingston Town Stakes (2000m) at even money.

While opting to bypass the $1 million Group One Golden Rose (1400m) with unbeaten colt Pierro, Waterhouse will still be strongly represented by Kabayan who is the $4.20 second pick behind Nechita.

Tohunga is at $3.80 and being shaded for favouritism by Gangster's Choice ($3.60) in the opening race while Waterhouse-trained stablemates Fat Al ($3.40) and Fast Clip ($3.60) are vying for top billing in the Group Two Sebring Stakes.

Fat Al is returning from a successful autumn campaign in which he was unbeaten in three starts, culminating in his Group Three Frank Packer Plate victory.

Waterhouse believes his star is still on the rise.

"A very talented young horse in the making. He was most impressive last preparation and he's come back bigger and stronger," Waterhouse said.

Fast Clip was also to the fore over the Sydney carnival winning the Doncaster Prelude and finishing fifth to stablemate More Joyous in the big Randwick mile.

He is being aimed towards next month's Epsom Handicap and has a handy fresh record.

"His coat hasn't quite come through yet but as a couple of the jockeys have said to me, it was exactly the same last preparation," Waterhouse said.

"But I'm very happy with him and he's going well."

Waterhouse will saddle up more than a third of the eight-horse field in the Sebring with stayer Tullamore, a $17 chance, rounding out her trio.