Clean Air Clear Stars – 3rd Annual Global Cooling Benefit Music Festival – 3 Days 3 Stages 1 Festival. September 18th 19th and 20th, 2009. This year CACS is FREE TO ENTER! Once again this year we will be offering camping at the event. Camping vouchers will be available at the entry points of the festival and will be granted first come first served for $15 per night per one tent.