We plan to go to Nong ping from the airport, how do we travel to our hotel in TST with luggages?

Hi, do you mean from the airport to your hotel or from Ngong Ping to your hotel?
From the airport, you can take Airport Shuttle Bus no. A21 to Tsim Sha Tsui and then walk to your hotel.
From Ngong Ping and from Citygate, you can go to Tung Chung MTR Station to take subway Tung Chung Line to Lai King. Then transfer to Tsuen Wan Line to get to Tsim Sha Tsui. After that, you can walk to your hotel.

If you have very big luggage and you also need go to the airport to leave HK, I suggest you store it in the airport. After all, you may buy other things at Citygate ~