Yes, of course she had many capabilities but she needed assistance with daily living skills on a regular basis.
She may have needed assistance while walking, especially in difficult terrain, such as a steep hill, and definitely for all the stream and river crossings on the trail that leads to the waterfall.
She did not require a wheelchair or a walker, so obviously she was capable of getting around in a regular environment.
But in order to navigate her way through the jungle, it just doesn't make any sense that she could have done it alone.
She would have fallen many times, and that she did not have any severe injuries other than some bruises on her legs and scratches is unbelievable.
Just because she had disabilities doesn't mean she was not capable of travelling with her parents. They knew what her limitations were and I'm sure they had the means to help her.
That still doesn't mean she could have done all those things independently. If she never even went out into their garden by herself, imagine what it would be like to walk for days through the jungle. Imo