the title did narrow it down to the U.S.A. but I have to agree with some of the other posters that Cape Breton is about as Scottish as you can get in North America.
The Gaelic College of Celtic Arts http://www.gaeliccollege.edu/ is a treasure and they do speak a more original version of Scots Gaelic than they speak in Scotland today. Has to do with their isolation from other influences.