Growing up on PEI, I don't think I knew anyone who kept a snake.
My grandfather had a garter pit in the ditch beside his driveway for most of my youth though. They would throw all the rhubarb leaves from his garden in beside the culvert and the snakes would sun themselves on top of the leaves.
There were so many color variations it was crazy. When I was a todder I'd sit in the middle of them and just ogle them. Then they had a construction crew come through and dredge out the creek behind his house and some of the soil was used to fill in the ditch. All my little friends disappeared