I don't really know if this is a stupid question or not! I've heard different points of view on this subject. Some say you need one, some say it isn't really necessary at all, and that you would have to be clinically insane to not be able to follow the trail as it is so well trodden and well marked. What about trail rerouting, etc.? To be honest, I haven't really done any real wilderness trail hiking yet, so this is something I feel I need a little more clarity on, as this may or may not affect my safety. What's your opinion? Thanks.