I only have one BP. I tried feeding in a separate enclosure but she got so shy and ignored the food completely. She concentrated on escaping. Since then, I have fed inside her own enclosure and on cypress. Nothing bad has happened. Through everything she has never struck at anyone and I reach in with my ratty smelling hands too am she still hasn't tried to bite me. I kinda want to get bit just to get it over with but I fear it may not be a ball python bite that is my 1st.
I can tell you with some balls, the stress of moving is just enough to keep them from eating. That was my limited experience. Even if I remove cage furniture or water bowl she refuses. At least in the beginning. She doesn't care now but if I do remove something I have noticed her response is more calculated and slower. I am sure every snake is a little different but that was my only way to get mine feeding was to keep everything the same. Now she eats like a champ and I have less work to do. Open and offer. (I feed live as the breeder did. I haven't made the switch to F/T yet.)