Suggestion: when I have to reach in to change a water bowl or spot clean (pooper-scoop) & my snake is in their hide, watching from the doorway hoping
"that thing [me!] moving over there might be edible or ???", I have a ping-pong paddle that I use to gently back them into their hide & block the doorway with.
Now I don't currently have any BPs, but this works with any harmless snakes that may misunderstand your invasion of their space. I don't care for bites, &
none of these snakes are biters when handled...but hey, motion does rev them up & their long reach means they don't always know what they're trying to catch.
They don't identify us visually.
Anyway, the weight of the paddle leaning on the doorway of their hide gives me just the right intervention. When you move it in front of a snake, they back
up, quiet down, & stay in their hide while you do what you have to do. Problem solved.