Sponsor, Sell, Advertise, or Volunteer… Sponsor the Hassayampa Music Festival! Click Here to find out more about sponsoring the Hassy Music Festival! Vendors If you’re intersted in being a vendor at the Hassayampa Music Festival, Click Here! Advertise Want to advertise at the Hassy Music Festival? Click Here to read more. Volunteer Please click here to learn more about volunteering for the Hassy music Festival, as well as the link where you can sign up!