I don't make a point of carrying extra schedules or maps, but I cheerfully give away train and bus maps when I have them, because I know where to get more, free. (One thing I find disconcerting about the otherwise excellent Montreal transit system is that there don't seem to be any printed maps, either free or for sale. There are nice circuit-diagram style maps on the train and station walls, but apparently nobody at the STM has thought of distributing physical copies.)