Re the notion that Redcoats would be resented: If you check out a book that has just come to my attention, Canadians In The Civil War by Claire Hoy, you will see that although the Union had thousands of Canadians (still British at the time) fighting on their side, Canada was in fact very Confederate-friendly. Also, while the Revolution was still in memory, the Confederates were probably very Scots friendly, since huge numbers of their forces were from of Scots and Scots-Irish backgrounds, and also because of Sir Walter Scott, the author, who was so popular in his day that Mark Twain blamed him for the whole Civil War through his promotion of chivilric notions of soldierhood.

(I can't swear that 'chivilric' is a word, but I refer to the promotion of noble codes of behaviour and citizenship from the Middle Ages.)