That snake is ready for hoppers.
Also, most snakes feed fine in a feeding viv, very nervous or shy specimens can be exceptions. If you feel like you have a shy girl, try cutting a snake-sized hole in the bottom/side of a deli cup, and just put it in her viv (with the warm food item inside) when she's hungry. They'll usually find the opening pretty quickly, and eat inside. Once they learn to find the "food hole" they get to be pros at it! A few hard heads still pull the food out, but once they get used to it, they seem more inclined to just climb on in. Good luck. I feel sure she'll be fine, she's a good sized critter.