I was hesitant about feeding him in his tank because I'm worried about impaction/the substrate I'm using, not because I'm afraid of getting tagged, or think my snake would be mistaking my hand for a prey item. The risk of impaction was the only reason I considered feeding in separate tub as an alt option, but I'm going to trust ppl with more experience and knowledge than I currently have, and just feed him in his tank and not stress about the substrate. I'll just go get those plastic tubs for substrate storage purposes lol.
Thank you so much to everyone who provided answers and opinions.