I'm on lunch break, and I see there are 5 pages of responses so far, so this may have already been addressed.
What sort of "nasty feeding responses" are you concerned about? I've been feeding ~40 ball pythons from babies to adults on a weekly basis in their enclosures for the past several years.
They have fabulous feeding responses. And none of them ever mistake me for food when it's not feeding day.
Are you concerned that you'll condition them to bite you in their enclosure? If so, that's an internet and pet store myth, and very unlikely to happen unless you happen to smell like a rodent.