Navidad Crush

I am trying to plan a trip within Mexico by bus from and returning to Zihua.

Is it safe to assume that the big influx of national tourists will end by January 7 or is it likely to continue to the end of that week on Sunday January 11th?

Gracias

Kids return to school on the 11th.

Thanks. That gives them just 1 day shy of a month off from school!