Hi,
I will arrive on Tuesday morning at 6:25, so I guess I will be able to make my way toward the venue around 7:00. It doesn't look complicated to get there, I will simply buy an Octopus card and take just the next train into the city and either change to MTR or a bus line - that can be easily found via Google public transport navigation as there is free Wifi at the airport.
A bigger challenge will be my way back - my flight departs on Monday 0:25 - so basically at Sunday night, right after the party. I looked up public transport from Shek O beach to the airport, which doesn't look good - ~2:5 hours trip... Maybe someone has a better suggestion for that journey.
Thanks,
Manuel