As I understand it, the best way to do this is the A11 bus, but if that's all I'm going to do in HKG can I just buy a ticket as opposed to needing an Octopus card? Also if it's going to be in the evening rush, am I better off just going by train then connecting 1 stop on the MTR?

(for those of you paying close attention, my plan to fly VS with the free limo has been usurped after I picked up award seats on CX in J)

Thanks as always

ST