The "Yankees" you (and other southron folk) describe are, for the most part, not real Yankees. They are part of that large, transient, rootless population that is taking over your cities just like they've taken over ours. They just outnumbered us first. I call 'em wanderers. Real Yankees stay put and prefer chowder to barbecue. When we cook out, we rip a lobster in half and toss the pieces on the grill.
Take some friendly advice...pack your zoning boards with your own people and never, EVER let your local governments fall prey to the wanderers. If you do, your best barbecue shacks will be shut down for "health code violations" and replaced with Pizza Huts. Its the homogenization of America.