I also feed in the enclosure. I think it's much easier, and less stressful for all involved, especially the snake. I've had absolutely no issues, and I think it is due in part, at least, to the fact that I make sure to do something in his cage each day (ie: replace water). I also make sure to hold him at least a few times a week for a short period of time. The only time he tends to sometimes get S-neck is the day after he's eaten if he happens to notice me near the cage. (Ghost's boop brain maybe??: "sooo... do you have rat?") Even then, it's not even aggressive; it almost seems like he's wondering if perhaps I do have more food. I know they probably don't have the propensity to beg for food in the traditional sense, but I almost get that impression.

He just usually puts his head back in his hide if I put my hand in the tank. If he doesn't, I take my hand out, and wait for him to go back to sleep. The next time I pick him up (48 + hours after feeding), he's doesn't get S-neck or strike or anything.