While the coarse and zip lines might be beyond a disabled persons abilities, you can go to the zoo next door and enjoy the animals right under where the course goes. We had a grandmother with our group who enjoyed sitting in the jungle section and could cheer us on from below. At that point we were only 20-25 feet up, so we could clearly hear her when she cheered us on.
The zoo is right next to it so they can enjoy that part of it but the treetop trek is not handi-friendly.
You need to be able to climb a tree using ladders and wooden spiral stairs that go to the top of trees.
Thanks! Your answer is awaiting moderation.