Hi - flying SIN-ICN tmro. This close in, can I rely on the seat map to be a fairly accurate representation of how full the flight is? Or do most people select seats at the airport? Expert Flyer doesn't have seat maps for OZ and I haven't found them anywhere else. Online seat selection shows it wide open and I wouldn't mind having no neighbour on a Y redeye. Trying to choose my seat accordingly.

Thanks in advance for sharing your expertise!