Since Ronald has not responded, I will add my comments.
The H does have a spotter's deck (for guests only) which I used in 2023, on the way home to Australia after attending Airventure. It's a great location and IMO it's better than the parking garage because the shooting angle isn't as steep.
He may also be photographing from one of the parking garages, just N od the H.
Hope this helps. Best wishes for 2024.