Campbell is not the type to head to Scotland for a bank balance boosting jolly-up.
He told the Scottish Sun last night: "I'm a winner and that's all that would interest me if I joined Celtic. I would also give Scottish football total respect."
The big news for Celtic fans today is that Campbell is becoming increasingly attracted by the idea of heading north.
He also said: "I think Celtic want to get back to where they should be. It's a MASSIVE club.
"Neil has told me that the main man at the club is also determined for success again.
"The ambition is to win the championship again and make proper in-roads in Europe. For me that's exciting.
"You want leaders on the pitch and that's why Neil is looking at me. He wants more of them in the side. Not only does Neil want to push Celtic domestically, he wants to push them in Europe and be a force again.
"That really appeals to me. When you go out there you want to know the whole club is behind that push."