Carter commutes to Christchurch from Auckland, where wife Honor lives and works, an arrangement which could be tested by the addition of a baby.
However, Blackadder said he wasn't too concerned about Carter's recurring injuries. The world's best first-five's trip abroad for the Crusaders might be in doubt, but he has rated himself a good chance to wear the No10 jersey against England at Twickenham on Sunday morning after a calf injury prevented him from playing Wales at Cardiff.
Carter's most recent issue has come after he spent a long spell on the sidelines with the Crusaders last season due to a hamstring injury, which followed last year's World Cup-ending groin problem.
"Obviously he's had a few injury issues but they're all quite random,'' Blackadder said. "He's a dynamic, explosive, player who plays the game at a high intensity. He also puts a lot of strain on his body with his goalkicking.''
Having signed with the New Zealand Rugby Union until after the 2015 World Cup, Carter is highly likely to ask for a sabbatical in 2014 - and given what McCaw said in a recent interview with the Guardian newspaper about his impending break, that is likely to be something Carter would look forward to.
McCaw said of turning up at Stadio Olimpico for the All Blacks test against Italy knowing Sam Cane would be wearing his No7 jersey: "It felt a bit weird even if I'd prepared myself. During the week I was fine and even when it was the captain's run I thought: `'Aw well, done a few of those'.
"But when I got to the ground and felt the buzz I thought: 'Jeepers, I miss not pulling on the boots today'. That was the moment when I thought: 'I haven't had enough of this yet'.
"It's also made me enjoy these last few weeks because I haven't been thinking: 'Oh, I've only got four weeks off and then I'll be straight back into it.' There's light at the end of the tunnel.''