I've read that the northern colonies were far more hawkish, which is usually attributed to British taxation being a much bigger economic issue for the New York/New England shipping industry.
The impression I've always gotten is that the South was more on the fence with the whole war thing because the cotton/tobacco trading situation was suiting them fine under England's rule. On the other hand, England seemed like it was moving a lot faster to outlaw slavery, which (I'd imagine) would make secession a lot more attractive to southern colonies.
tl;dr was there a serious movement in South Carolina or Georgia or anywhere else to be like "Hey let's stay with England!" If so, how close was that to being a reality?
Quebec, Nova Scotia (which included New Brunswick at the time), Prince Edward Island, Newfoundland, East Florida, West Florida, Bermuda, and all the British Caribbean colonies remained loyal to the Crown.
Of these colonies, Nova Scotia came closest to sympathizing with the revolution, as revolutionary supporters, led by Jonathan Eddy, took up arms and seized Fort Cumberland, before being defeated by the British.