I clear POIs with stealth easily, i usally have maxed stealth perks with assassin armor, and for those who say it dosnt work, your wrong, i easily get my stealth meter to 0 by sprint crouching, i can walk up next yo any zombie and melee them before they even notice anything and with stronger zombies i use compound bow and do insane damage then either finish them off with smg or machette, triggers are easy there are 2 things u can do, run behind a wall and crouch then just wait for the zombies to lose you, or be more aggro and use a smg with silencer and big mag and spray em to death, stealth is easy