page 92 of 239 of The Devil’s Highway: A True Story

Groups of 30 or less were what went across the border, any more than 30 and it was too large of a group to control. But 30 is still a lot of people, that’s like a whole classroom of students, and even half of that size can be hard to keep everyone doing what you want or need. 30 is like a teacher feeling her class is overcrowded, and so the coyotes feel the same way probably.