No, but I have hiked and camped in the area. We first got in contact with these tribal people when our GPS lost it's signal and were wandering around blindly, it was as if a sign from the Lord himself,  an analogy of life that these tribal people were living without the proper guidance of the great Lord Jesus Christ himself. We ran into these people while they were hunting mountain goat and yeti. At first we were reluctant to engage them as they seemed dangerous, but with the Lord's love in our hearts and his power of guidance we drew courage to talk to them. They were semi naked and armed with primitive weapons like bow and arrow and spears. Our presence threatened them at first but one of our members started singing the happy birthday song. When asked why she did so, she told us that her heart was over joyed as if the Lord himself touched her and that she was going to teach these uncivilized people the way of the Lord and the saviour, a new birth for their tribe and the song does indeed reflects that. To our surprize they put down their weapons and guided us to the correct path. We vowed to return and learn their language and their ways before we could infiltrate their lives which we did in the coming years. They let us in to their way of life and we learnt their language.