Campbell's 3kg apprentice claim will be a big advantage to his mounts who will have to plough through a heavy track.
Race 2, a rating 90 event over 1800m, looks to be a battle of the claiming riders.
Campbell rides the Barbara Verlinden-trained Shantav, who will be having his first start since August.
The Wingatui galloper has performed well in a fresh state and has a handy record at Gore. He also copes with wet tracks.
"He has got a nice draw so he should be pretty competitive, I think," Campbell said.
Shantav's main rivals, What's Up Alf and The Quiet Man, have the benefit of more recent racing.
Brett Murray will claim 2kg off What's Up Alf and Amless Bohorun claims 3kg off The Quiet Man.
Campbell is hoping he will have better fortune with Belle Hope in race 4 (1200m) than in their last outing at Wingatui, earlier this month.
The Steven Prince-trained mare ran in to dead ends when Campbell was looking for a run in the home straight.
"She was very, very unlucky. Not a lot went her way at all.
"I am not sure she would have beaten the winner, but I think she would have definitely been second or third."
Moss Jazz was impressive in another race on the same day at Wingatui and is a danger to Belle Hope along with Taponisme and Omar.
Bookmakers opened Campbell's ride in race 6, Breakdance, a $2.50 favourite yesterday.
The jockey is hopeful the horse can justify that by handling the heavy track conditions.
Breakdance signalled he was close to a win when running second to Our Flying Ace over 1200m at Wingatui.
"It was a really nice run last time and the extra distance [1355m] should suit him.
"Hopefully he handles Gore and the wet track and he should be competitive again, I think."
Little Bossing and By Magic opened as equal second-favourites behind Breakdance.
Campbell also rides Sir Ed in race 1 and The Bumper in race 7.
