Sunderland prepared to be patient for Campbell signature
The veteran centre-back is available as a free agent after his short-term contract with Arsenal expired and he is on the lookout for a new club.
Campbell is due to get married in the coming days and Bruce feels his focus will be away from what his football future holds until later in the month.
Bruce told Sky Sports News: "We have had a conversation with Sol, I've known the lad a long, long time.
"He's obviously got some decisions to make.
"We've shown him around and shown him what we've got, so we will see what develops over the next 48 hours.
"But I think Sol is getting married next weekend and then is away on honeymoon so I wouldn't have thought there would be much before that happens."