I travel via KLIA in a few weeks and I'd rather avoid the immigration queues there, last time I arrived just behind Ethopian airways and it tooks nearly an hour as they questioned half of the flight it seemed, so I have a desire to stay airside this time.

I intend to arrive at KLIA the previous night on MAS into the main international terminal at say 9pm. The following day I have another international flight with Oman Air at 9.30am. These are ticketed completely separately, basic economy fares too, first isn't even booked yet. Will I be able to stay at Sama Sama KLIA airside transit hotel? I presume given the limited staff capacity of Oman Air checkin and representatives are only available a few hours a day around the once a day departure., how does this work - complete newb here

Also I would like to take luggage but I can forefeit that if saves the hassle of immigration?