So even if the achievements of four years ago lessened some of that load, McCaw was hardly expecting his time in the United Kingdom to be akin to a spring getaway.
"You don't walk around with a big grin on your face and say, 'this is pretty cool'," he said before the team left for London. "I always say that playing sometimes isn't all that enjoyable but that feeling afterwards, if you've put a good performance together, that's what you do it for.
"[2011] was pretty hard work but you take enjoyment out of doing the job right and working hard. At the end of it, if you've done what you set out to do, that's where you get the satisfaction from and have a grin on your face.
"I enjoyed [2011] afterwards - and that's pretty much what I'd like to repeat."
The lack of pleasure he derives from playing is something that may surprise, given the length and scope of McCaw's illustrious career, but that's not to suggest the 34-year-old is repeatedly inflicting upon himself 80 minutes of drudgery. It's simply, as a competitor, stepping between the lines means the time for merriment is over.
"When I say I don't enjoy it, I love the challenge of going up against a team that's trying to get into you and you want to get into them," McCaw said.
"If you didn't like that then you wouldn't be out there.
"But it gets tough and, at times, you've got to find something to dig in and make a difference, to get to the next breakdown. That's the bit as a competitor that I love. You test yourself in the toughest environ-ments and that's where you want to be.
"I think at a World Cup, if you didn't want to be under the pump, where it all comes down to what you do in the next game, you're doing the wrong thing."
Preparing for his fourth tournament, the anticipation of the intense stakes is what keeps McCaw going.
"I've had some good experiences and some not-so-good ones," he said.
"The All Blacks haven't won it out of New Zealand and that's something that, at some stage, someone will do. So we've got an opportunity - that's the way we're looking at it. It's a reason why this team can do something special."