Newspapers are another good source. Newspapers almost always report about upcoming events, which can be a good way to get a good idea of upcoming shows in the area. Anyone who organizes a car show in your area will make sure that their event is listed in the newspaper, which is a great opportunity to find everything in one place.
Some of your other options include searching for the nearest auto show on your favourite search engine. This option is most effective if you don’t care about staying in a specific area. Narrowing down a particular area is usually much more difficult, but it is still possible. Generally, this is a good way to plan your plans for a long trip in the future. If you are going to the auto show, you can book a hotel at a discount in advance.