I have been going to the festival for many years and have photos that your organization could use.  If you would like to see them, go to my Adobe Behance web site:
https://www.behance.net/gallery/36845493/Tucson-Mariachi-Festival-2016

My wife and I will be going again this year and will be taking more photos.  You can use them and previous ones for your web site or gallery.

Cheers,

Bruce Yates
bruceyya6@gmail.com
720-989-7416