Will be flying later this monthly on the following flights,

SYD-BKK on TG 472 15:30 - 21:05 First

Next day connecting to

BKK-SGN on TG550 07:45 - 09:15 Biz

SGN-TPE on BR392 12:45 - 17:00 Biz

Will I be able to check my luggage all the way through from SYD to TPE?


Related question, should I...
1) get the expensive day room inside the airport (assuming I can check my luggage all the way thru) or
2) Just head to the F/C lounge in BKK till it closes then tough it it out for a few hours till it opens, or
3) go through immigration and taxi to the airport hotel and wake up early and deal with the whole check in process (I've never been through BKK)

Thanks in advance!