User blog comment:Kaido King of the Beasts/Chapter 802: The Elephant in the Room/@comment-5380248-20151002060914/@comment-27035495-20151002063119

True. Well, it's been at least a year since he became a Sichibukai, and during that time his crew were no longer wanted and free to move around. If Bepo really is a Minkman, it's likely he knew his way around it or at least a way to track the elephant or had enough time in their hand to just travel. And when they reached Zo, they simply told law where they were and to follow him there via vivre card. This is just a speculation but it's likely.