The Red Dragons, backed by Hollywood stars Ryan Reynolds and Rob McElhenney, are chasing a historic fourth successive promotion to reach the Premier League.
After a slow start with just two wins from their first 10 games, they now sit in the final Championship playoff spot with 44 points from 29 matches.
Campbell described their rise from non-league to the Championship as “incredible.” He told BettingLounge.
"The whole Wrexham journey has been incredible. The way they've connected with the fans, it just feels like a never-ending story that keeps getting better.
"It would be great for football and great for Wrexham if they could make the playoffs and do the unthinkable, ending up in the Premier League. It's a fantastic story.
"Some of my old teammates have been part of that journey, and it's always great to see teams doing well, especially when you have had players like Steven Fletcher, James McClean, and now Lewis O'Brien adding to the history they're making."