We are staying at either evergreen hotel or regal riverside hotel, is there any bus to the hotel?

Hi, bus no. A21 or N21 (overnight bus) can take you from the airport to Evergreen Hotel. Besides, the bus is close to Jordan MTR Station.
Regal Riveside Hotel provides hotel shuttle bus between Disneyland, Ngong Ping 360 and the airport. In addition, it is around 50m from Sha Tin Wei MTR Station.