hi bkshres, if you've 12 hr transit and you've been told then you will be provided with a hotel. don't worry..its quite simple..but do double check with yr travel organizer to have your name clearly for STPC. 1. after arrival at BHR,  go to the 'stopover/hotel/taxi counter' near the tranist/visa area..show yr BHR-KTM boarding pass and yr pp.. your 'printed STPC voucher' will already be there in their table waiting for you.. they will give it to you and everything will be listed in their voucher (e.g.  transfer, 1 visa, 1 dinner, 1 breakast, room )..follow the 'visa' line show that voucher..and they will stamp a 24 hrs visa..go down.wait for the hotel transfer car..check in the hotel. (the hotel will keep yr passport)..you might be given a shared room  etc..the next day the hotel will transfer you back 3 hrs prior to the chk in time..follow the immigration..they will stamp your departure...

hotels can be 30 min drive in teh city...depending on the city from where you arrive..a simple 'All seasons' apartment-type hotel or even a better 4-5 star may be given.it depends.

so my experience so far has been its simple and straigh forward exercise. You don't need to worry abt yr checked baggage. just check them to KTM directly. carry yr basics in yr handcarry if you want (toothbrust etc)