Here's why we can infer this:
* The old man's words: The old man who joins Montag and the others mentions a "few of us left," implying that they are part of a larger group. He also speaks of "remembering" and "keeping the knowledge" alive.
* The destination: The group walks towards the rising sun, suggesting they are headed towards a new dawn and a future where knowledge is valued.
* The symbolic act: The group is carrying books and knowledge with them, symbolizing their commitment to preserving and sharing information.
* The absence of a specific location: Bradbury intentionally leaves the ending open-ended, inviting readers to imagine the future of the group and the potential for a new society based on knowledge.
Therefore, while not explicitly stated, the group's journey suggests they are seeking a safe haven where they can continue to share and preserve books and knowledge, a place where the fire of censorship can't reach.