Morning before 13:40 flight out I woke in the dark and headed for Kata Tjuta. Sunrise I viewed at the Dune Viewing Area, which has a great look at Kata Tjuta and also the sun rising behind Ayers Rock.
The showpiece is the Valley of the Winds Walk. I did that in 1:40 without breaks. The path is very rough in places, must be quite fit for the walk. Once in, the only walk out is to scrabble back out. The hike is fun, the views interesting but nothing like Ayers Rock. Kata Tjuta is much better in panorama.
The Walpa Gorge Walk has a separate car park and can be done in 30 minutes. The gorge dead-ends with limited view, so a bit of a downer.
If time is short Kata Tjuta can be skipped, but do consider sunrise at the Dune Viewing Area.
Back to the hotel for a shower, nice thing about shared bathrooms was I could get in after 10 am checkout.