What I did is take out its pack with my argintavis. There was a 120 and I wanted it so first I got it's pack to attack something so maybe the weaker ones were taken out, then attack the rest of its pack, when they are all dead the strongest one will be quite hurt. Wait about 10 minutes then tranquillise it with a longneck rifle. This will take some time so bring a few bola's and a dinosaur with lots of health if it turns around to attack you don't panic, simply get a spare bola and trap it again, you will take damage from this so as soon as its free trap it, if it attacks you keep swinging the bola and DONT run away because it's faster.
Make a little trap carry with argy ( it can still attack your argy so give it high health ) then drop in a trap.
No need to worry about the pack just pick the leader or the one you want.
Once you have three you get a pack bonus and a leader bonus for highest level wolf