From what I understand, they are very similar to the Australian Dingo. This is just what I found from a few websites:
"Preliminary mitochondrial DNA testing performed by the University of South Carolina's College of Science and Mathematics shows a possible strong genetic link between Carolina Dogs and other primitive breeds like the Australian Dingo"
"Brisbin noted that these dogs were almost identical in looks to the Dingo. The Carolina Dog could almost pass for a larger size Dingo."
"Called the 'Carolina Dog,' these animals most closely resemble the Dingo of Australia, which may indeed be among their closest living relatives"
I also found this to support your wolf-cross:
"When the first primitive humans crossed the Bering landbridge into North America from Asia, they were accompanied by a primitive form of dogs that resulted from the domestication of southwest Asian wolves...These small, nondescript dogs...called the 'Carolina Dog'"
Not sure if you wanted that much info, but I had fun looking it up, lol.
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Rachel Squier
"The more we live by our intellect, the less we understand the meaning of life." -Leo Tolstoy