For the Butcher, I find that sledgehammer or katana is best. Just get up real close and swing/slash away. Somehow his attacks does not seem to affect you when you are swinging your weapon. You will get hung on a hook and he gets a few cheap slashes at you but just run and get to the milk cartons when you get off. Avoid the flying meat at all cost!

As for survivors, you may want to follow instead of lead. Use the waypoint to set a waypoint ahead and follow your survivors and hack away at any zombies that get in the way.