I also spent a recent summer taking art classes (including gambelan) in Bali and had some of the most amazing experiences of my life. There is so much to say I can't even begin, but one teeny tidbit of information I would like to contribute to possible travellers is this: spend most of your time elsewhere on the island but be sure to end your trip in the southern surfing town of Kuta. It is there that magic mushroom omlettes are sold legally for the equivalent of $4. Eat one on the beach and you will have the most amazing out of mind experience ever.