Originally Posted by
Guy Betsy
If its the next day, your options are the benches or checking in at the main Sama Sama hotel or taking the train into town
Aside from the fact, corrected in following post, that international arrival grants physical access to the Sama Sama (although unclear if onward BP is needed) there are more options than "benches", the main Sama Sama hotel or town.
The Concorde Inn is a short shuttle ride away, and there are several options at KLIA2 (which is also short train or bus ride away) including Tune Hotel, rooms at landside Plaza Premium Lounge and even the Capsule/Container hotel (pods). Plenty of options.