Snakes associate food by scent and heat. Feeding in the enclosure is best. I would start to feed her rat pups or rat crawlers. They are larger and safer. The problem with the theory of feeding out of the enclosure is if this is true they are gonna think everytime you take them out it's feeding time. Snakes react to scent and heat signature, not a change of scenery. Most of my snakes come out of their hides to eat when I walk in the room with rats, they know it's feeding time now if you stick your hand in there and they are expecting a rat you might get hit because you have a heat signature and they smell rats. Thus the rule never handle a snake after handling rodents, you may get mistaken for one. Since they are ambush predators they like to feel safe before the ambush, taking them out could make them insecure and not feed. I used to think the same thing and took my first out and eventually it refused out of fear. Some info we read or hear is OLD and outdated but still circulating. Thats why the forums are great you can get up to date info and the lastest sucessful husbandry tips
Oh yeah hides are a must even if it just crumpled up newspaper she can hide under(for now)