Is it possible to go from Surna Bali to east Java to see the crater then back again in one very long day? Are there tour operators who will do this? Am staying in a timeshare for a week in Surna Bali and would just like to take the ferry and see the crater then return. I know it's a couple hours to just get to the ferry in Bali, but one very long day would be fine. Please advise. Thanks!