Thanks X, very helpful. I am flying in qf (577), so will try to throuh-check my luggage from SYD. Hopefully Emirates will let me through! 

Thanks for the response, Hunrus. But I am talking about Perth airport. Will Emirates let me check in 5 hours before my flight at Perth?

Emirates early check in. I'm flying to PER in August from SYD, and I land at 4pm. My flight onwards to DXB departs at 10.10pm. What is the likelihood of being allowed to check in and use the Emirates lounge early? I'm flying first class on Emirates if that helps... Thanks for your help.