You don't need booking airport shuttle in advance , there is every hour shuttle service to and from airport which is about 8-9 km distance. The aftermidnight shuttle service is less frequent.

the hotel still doesn't have its own phone number because of the telephone line haven't reach this area, please call this number +6282365211199. it is their mobile phone number

yes it is possible, the local taxi driver park their taxi near this hotel and they charge for around 50.000 IDR for a one way to the airport, beside that this hotel has its own vehicle that can take you to the airport but it has its own schedule if i'm not mistaken..please inform the receptionist a fay before the check out to make sure the vehicle is not full (the vehicle take some crew airlines and hotel guest to the airport)