What has not been mentioned yet is if Agung gets angrier where will the ash cloud end up? If a cyclone brews in the region that will only assist to intensify the spread depending on the winds.
Remember a few years ago an Indo volcanic eruption closed an Australian airport, not to mention re routing of flights to Aus from Asia.
If I was in Bali I know I’d be trying to get on a boat, or renting a villa for the next month and enjoying life.