I agree with cxorcist to some extent in that the HAS bus does take based crew to their accommodation to start their rest period. Not only that, it would be unreasonable to expect to have to wait in line at an outports for crew transport so why the different mentality in HKG?
However, rather than simply go to the front of the queue and annoy the ground staff (most of whom think we're a bunch of prime donne) it would be better to arrange a separate bus, like those provided for selected based cabin crew. When the crew have taken their seats it would be reasonable to then allow the ground staff to share the transport. IOC know the ETA of ULH flights that arrive over the busy period so it would be a simple matter to arrange the transport accordingly.
STP