The Krugs that spawn on large krug death dont return to camp if they spawn outside of said camp.
1. Agro a krug and pull it out of camp, far enough so its in the zone where if it stays, it will hard reset.
2. Kill it in this zone.
3. Smaller krugs act as if where they spawned is thier camp, and will return there until they despawn ~10 Sec. They do no return to krug camp if you leave them.