Warren Gatland's men are due to arrive on Wednesday, three days before their first warm-up against the Provincial Barbarians XV in Whangarei.
The Lions do not face New Zealand in the first of three Tests until June 24, but Hansen insists that he would have taken the decision to arrive with more time to prepare for the overseas trip.
"You'd want to be there a week at the minimum [ahead of the first Test]," he told The Times. "It's nicer to be longer than that. When we tour we have total control over when we leave the country.
"If most of them are not playing, what's stopping them getting on a plane now with most of the squad, for example? The option you've got is for the sake of the team.
"We'll get over there and we'll see [the rest of] you when you get here. What they are asking them to do is pretty difficult, get here Wednesday, play Saturday."
The Lions, seeking a second Test series triumph over New Zealand since 1971, will play 10 matches during their latest tour.