I keep mine in a glass tank. I use heat lamp to keep ambiant and a UTH for the belly.
Not real difficult to keep humidity since they don't need it high like BP's, throw some eco earth in the mix and spray every now and then.
But maybe that's a situation that just works out for me and the snake.
I like my Milk in a glass tank because he like's to burrow and climb around...hard to put neat climbing stuff in a rack.