Don't know for sure, but I guess a blanket smelling like baby kitties would be a dinner bell for a snake.
IMO, snakes may be 'good' and eat rodents, but like the Mint I once planted in my herb garden but still am digging out everywhere on my entire property 15 years later, a 'good' thing is a 'bad' thing in the wrong place. This snake went to the dark side when it chose your fish over field mice. Now it is merely a weed that slithers.
Google how to build a snake trap. One is a box with nails/spikes angled towards the inside of the box with a strip of carpeting over the open door and over the spikes to make it comfortable for the smake to go inside. Once in, they won't crawl back over the sharp points. It's the same principle as the spikes under the "Do not enter! Severe tire damage." signs in a parking lot.
But then what? Around here, relocating any wild creature is illegal. The bottom line: You trap it, you (or a licensed exterminator) must kill it. And people who live in the country can attest that they don't appreciate city folk's dumping their pests on them.
What I would do if I found a snake in the trap: Close the door of the box and drop it in a trash can filled with water, put the lid on the can and walk away. Or skip the box, channel your inner Mr. McGregor and get a sharp hoe.
