Cabin Fever Expo is Jan 17-20 in Lebanon PA. The North American Model Engineering show end of April In Detroit MI.
CF is about 100,000 sq ft of display including engines, trains, boats. NAMES is 30,000 sq ft mostly engines. In my view if you can only make one of them its CF hands down. More exhibits, more vendors more variety. I plan to attend both.
There are many outdoor engine shows all summer, all over the country, some of them have a model area, but mostly they are full size engines.