Well to add this, if you own a Garmin GPS, not only do you get 3 map updates per year but you can also install "BaseCamp" on your computer.
Using BC you can set up your routes, stops etc and see " the whole picture ".
Actually if your Garmin has all of North America then it includes Canada and Mexico, it also includes Alaska and Hawaii in detail. You can see all of the North American continent and can zoom into wherever you choose to. Almost every town or city has street maps in detail.
There is nothing like seeing exactly where your vehicle is at any given point in time using the GPS. No paper map of any flavour can do that !