If you go for live prey, you can just let it roam in her tank. As long as you keep an eye on the feeding, there is very little that can go wrong. If you leave the hide in, you want to make sure the prey doesn't go into the hide with the snake...that tends to spook them.
I have a little bitty girl that I am feeding rat fuzzies... they don't actually move a whole lot, so you can leave them in the tub/tank without a ton of supervision (once the rodent has opened it's eyes and is old enough to move around the enclosure, I always supervise the whole feeding) The fuzzies move enough to snag the snakes attention, and they can't cause any harm since they really aren't very mobile yet.