Originally Posted by sapguy

I would agree that it's not really possible to book FHR night and additional Hyatt reward nights on the same reservation.

Unless the OP is a Globalist, I further agree with your recommendation of booking the Hyatt reward nights FIRST then the FHR night(s) to take advantage of the 4PM check out.

And once again, if the OP is a Globalist, SOMETIME, the WoH Concierge MAY be able to "link" the 2 reservations - there is NO guarantee and YMMV.

This goes to show the value of being a Globalist