I have just been there. We are not far enough yet into out photos, but will post some soon.
But in a nutshell:
No long hard log up the mountain anymore, you can drive up, and park your car on the top.
From there 2 paths stretch out in front of you. If you go straight you will do a very long walk (worth it) to the escarpment, and will see the hide on the last bit.
Better go right, then after about 400 meters you will be at the hide. People in wheelchairs should be able to make it, but it is a cartrail only, so will be shake, rattle and roll. There are no intervening doorsteps or such.
When entering the hide you will see 4 benches and a lot of safety glass. The view is good (as are the smells if the wind is from the wrong direction), but the glass is slightly tinted.
There is ample place for placing your gear.
However, this is the viewing area only. You can photograph from here, but it might be a good idea to bring some stuff to clean the windows with.
The grass will be in the way. I think you should have your camera at least 30 centimeters above the table. I solved that by bringing photobag + beanbag and stacking them.
To your left there is a (locked) door, that is the photography area. I think you are supposed to get the key at Glen Rheenen, but I didn't know about that area till I left GG.
There you have desk chairs, as well as opening for sticking out your lens. Those can be zipped closed.
I think you will have the same grass problem, which is less easily solved as those openings are not high enough.
When we were there the carcasses were deposited in front of the viewing area, so anglewise you may not have the best view either.Here
is a recent blogpost by Tim Jackson and Morgan Trimble. That is about the area I was not in, but it shows it pretty well.
: The photos from our trip! Overhere! Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c