When CSU take to the field for a huge clash against competition leaders Narromine Gorillas they will be combining their family, sponsors and charity day into one large celebration.

The students will be sporting one-off jerseys for the occasion and will auction them off following the day's play to raise money for headspace and the under 19s Fijian team travelling the Central West in September.

"We've got all the parents coming down and we've had messages saying 'we're bringing plus six' so it will be a massive day for us," CSU club captain Nick Plunkett said.

"It's a chance for us to raise money and showcase what CSU rugby is all about.

"We have charity day jerseys as well so hopefully the parents bid high for those when we auction them off."

CSU and Narromine are level in the head-to-head this season.

Their respective losses against one another are their only defeats for the season, making for an exciting build up to their third and final meeting of the regular season.

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They're already set to meet one another in the major semi-final but Plunkett believes a big showing on family day will be a mental boost for the club.

"It will be a massive confidence boost if we can beat them here at home because we're going to have to play them during finals at Narromine," he said.

"We'll be missing a few players after last week [following a fight against Dubbo Rhinos] but we've had a few players returning back from injury which is great.

"Sam Chamberlin has recently come back into the first grade squad, we'll have Sean Pianca coming back after two weeks off, Mathew Brouff is in and Regan Hughes is also back."

When CSU previously welcomed Narromine to Bathurst they produced one of their best defensive efforts of the season to claim a 33-29 win.

The Gorillas got their revenge with a 50-10 victory on their home turf.

If CSU are to go ahead in the head-to-head then they will need an even better performance than their first game against the Gorillas, considering the weakened lineup they will be fielding on Saturday.

"They're obviously one of the best teams in the competition and one of the best teams in the Central West," Plunkett said.

"There's a massive disparity between them and the rest of the competition so it forces everyone to step up their game and at training."

The first grade men's game starts at 3.15pm.