The Nyngan based horse trainer, known by most as 'Snow', is preparing for a gruelling work weekend ahead of the Narromine Gold Cup.

A tilt at Kembla Grange will keep Robb busy on Saturday, before two horses meant for Parkes will instead head to Cowra after that race meeting was washed out, then he'll move closer to home for Narromine's main event.

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There's twelve horses in for Robb across the two days and plenty of responsibility to take on now that he's holding the reins of the family business.

Robb took over from father Rodney at the start of the month after the veteran trainer announced his intentions to step back from full-time racing earlier in the year.

"It feels really good," Robb said of the opportunity.

"It's a lot more work than I thought it'd be, I didn't think I'd have this many horses in as what I thought I'd be doing."

Technically, Robb's only had one start as a trainer; a run with Bells 'n' Bows in Dubbo last Sunday.

But Robb is a name that's become synonymous with racing in the Central West, and Brett's been part of the business for as long as he's been around at all.

"I've been dad's foreman now for four or five years, so I know what I've got to be doing, the first part's all going to be pretty straightforward," Robb said.

"The plan was always to have dad watching over my shoulder which probably isn't going to be the case, so I'm heading straight into the deep end with 24 or so horses about."

"He's only a phone call away and I figure I should have learned enough over the last thirty years or so," Robb laughed.

Bells 'n' Bows will be Robb's challenger in the Gold Cup on Sunday and while the mare's last start in Dubbo didn't show off her full ability, Robb has a good feeling about his chances.

"She put in a good run on her last start, I thought she was going to come down the outside and probably win it, but she got stuck in the wrong part of the track," Robb said.

"She's come away from that run really well and we've Clayton [Gallagher] on board, which is great."

"Sometimes she'll dawdle out of the gate when you think she's going to storm home and beat them, but Clayton's got a good record on her and he's got a knack for getting her travelling, especially up over a mile, she should be jumping a bit closer."

The 1600m race has also drawn entrants from some stiff competition, including Wellington based Michael Mulholland's red-hot runner The Sledgehammer, who'll be riding three straight wins into the event.

"I am a little bit nervous, of course," Robb said of his chances.

"I wouldn't want to go in and fail straight away, but I think it'll be alright this weekend, I'm feeling very good about everything."

"It's definitely a big weekend for a first weekend, that's for sure, but we'll get through this and then get onto whatever's next."