You do have to be quiet and pay attention, but they're surprisingly easy to spot when they're standing in craggy areas during the day. Nothing except goat and the occasional mountaineer gets there (and I do mean mountaineer, not hikers like me), and they're a protected species so not shot at, so they don't always hide. At night they come down in the flatter portions of the mountain - I've sometimes found fresh goat poo 5m away from my tent