I only have 9 snakes right now and im feeding them all Live ASFs. I just hold the rat by the tail and dangle ofer the snakes head then BAM. One of my snakes wont eat if he can see me so i use tongs and hold the live rat by the scruff of the neck and walk him into the hide.
Im lucky all my snakes will eat instantly at feeding time. I dont have a problem with leaving a live rat to wander the cage but ill be in the room the entire time constantly checking.
Never leave a rodent in a cage overnight.