You're welcome to go wherever you want, but I highly recommend that you avoid the 10th Floor of the Marriott for a photoshoot. I'd classify it the same way as people try to discourage photoshoots on the Atrium level or near the Hyatt's ballrooms (though the latter restriction seems to have been lifted due to everyone migrating to the Marriott). While there is plenty of room up there, getting there is an absolute nightmare. Since I don't do mornings that well, it might not be that bad, but I suspect the elevators will see plenty of use as people come and go around lunch time.
The 3 times I had to get there in the afternoons and evenings last year, it was almost impossible. The wait times and bad behavior were equal to the worst horror stories ever told about the Hyatt's elevators. And trust me, you won't feel like doing a photoshoot after going up 20 flights of stairs.