fyi Yaks are loaded at Ghana Summit. There is a bear logo near by but no yak logo on the map anywhere near here but it is a yak factory. Bald mountain top so you can see everywhere around you. Just zig zag or circle walk around and you cant help but see them all over the place with bears mixed in chasing the yak around. It is 5 or 6 to 1 yak to bear and I got the 5 bear that I needed in less then 10 min. LOADED.
Someone already mentioned this location but close to the Kyrate Tea Weigh station outpost just south of there. They spawn 3-4 at a time. Enemies too, so it is a fun place to cause chaos and hunt.
Also if you are starting out and want to get early access to the Z95 Sniper and P416 assault rifle, North-West of Kings Bridge there are two snipers guarding the radio tower and the soldiers carry the assault rifle. As soon as you can freely travel the map go there and get them.