In a Tor Q&A, we learned the following:
Week 11 Question: "In the books, Perrin calls on the wolves in times of need (rescuing Rand, searching for Faile, etc.). Do the wolves view his use of the gift as selfish due to his general theme of 'help ME', 'do ME a favor?' Does Perrin risk alienating himself from the wolves as a result of such actions?"

Robert Jordan Answers: "No, he doesn't. Among wolves, requests for aid are common, though aid isn't always given. Witness how the wolves withdraw from Perrin when they don't want to talk about a subject. Of course, there are wolves for whom the whole notion of talking to men is anathema, but most know that according to their lore, it will be a human who can talk to wolves who will warn them that it is time for them to take part in the Last Hunt, their name for the Last Battle. They don't know whether that will be Perrin or Elyas or someone else yet to be revealed to them, but most of them value this return, as they see it, to a time when men and wolves cooperated in the hunt. This despite the fact that the reappearance of such people tells them that the Last Hunt is coming."

It seems that the wolves can use the visions in the Wolf Dream themselves to see what might happen in the future and thus have their own "lore".

Elyas says in CoT about the Darkhounds:
“They were wolves, once. The souls of wolves, anyway, caught and twisted by the Shadow. That was the core used to make Darkhounds, the Shadowbrothers. I think that’s why the wolves have to be at the Last Battle. Or maybe Darkhounds were made because wolves will be there, to fight them. The Pattern makes Sovarra lace look like a piece of string, sometimes. Anyway, it was a long time ago, during the Trolloc Wars as near as I can make out, and the War of the Shadow before that. Wolves have long memories. What a wolf knows is never really forgotten while other wolves remain
alive. They avoid talking about Darkhounds, though, and they avoid Darkhounds, too. A hundred wolves could die trying to kill one Shadowbrother. Worse, if they fail, the Darkhound can eat the souls of those that aren’t quite dead yet, and in a year or so, there’d be a new pack of Shadowbrothers that didn’t remember ever being wolves. I hope they don’t remember, anyway.”

To us it's that Perrin will be the human who will gather the wolves to fight at TG. It's said in CoT: "The Last Hunt is coming. That was what wolves called the Last Battle, Tarmon Gai’don. They knew they would be there, at the final confrontation between the Light and the Shadow, though why was something they could not explain. Some things were fated, as sure as the rise and fall of the sun and the
moon, and it was fated that many wolves would die in the Last Hunt. What they feared was something else. Perrin had a strong sense that he also had to be there, was meant to be at least, but if the Last Battle came soon, he would not be. He had a job of work in front of him that he could not shirk — would not! — even for Tarmon Gai’don."

And Hopper says in TGS:
"It [the Last Hunt] comes [...] If Shadowkiller falls to the storm, all will sleep forever. If he lives, then we will hunt together. You and us."

This is also supported by a Dream of Egwene in TDR:
"And that dream of Perrin - with a beard! -leading a huge pack of wolves that stretched as far as the eye could see."

In TGS Perrin wants to learn to really master the Wolf Dream. Probably he will have to use the Wolf Dream to call and gather all wolves in their fight against the Darkhounds.

So, why do you think it is so important that Perrin will lead the wolves at the Last Battle, and is this his sole role then? Will Perrin just fight in the Wolf Dream, or do you think he will gather the wolves in the Real World? Why is it so important that the wolves fight the Darkhounds, or that the wolves attend at TG (channelers could kill Darkhounds as well)? Is ii maybe important that certain "pure" groups, like the wolves, Ogier or the Tinkers are there at TG?