In one of our conversations with Jorg and Andrea of Easy Divers in Pemuteran, and family they had visiting from Germany - we heard a lot about a trip they had done in Bali that was most out of the ordinary. We saw their photos of it and it looked like a lot of fun - I'll post the website and leave it up to you: - www.balivwtour.com (yes that really is Bali by VW!!)
Would love to hear if anyone else has done one