How can I visit Hinglaj located at Balochistan?

If I want to visit Hinglaj Mata's temple, what would be the most convenient route? I have come to know that every year Hindu worshippers go to visit Hinglaj Mata by bus from Karachi. I would like to know whether this is the only route to visit the Temple, or not. Is it possible to visit the Temple via Lahore?

I also want to know whether Indian Government employees face difficulty to get visa for this purpose.

Experts may kindly reply.