From my experience, this helps a lot:

-Try to get in at least 24 hours in advance especially if you know you will be flying for 30 hours. I don't know anyone who can do a 30 hour and be fresh for a meeting the next morning on 7 hours rest.

-Call while on transit if possible OR before you fly out to confirm your room and to inform them you are landing late and then follow up with an email giving your flight details and that you will be arriving late after a 30 hour flight.

Give your hyatt membership number as well.