Cowgirl....I live in Covington, LA it is about 30 miles from New Orleans and 60 miles from Biloxi. I have spent plenty of time in each. December is usually pretty nice, but it can get cold at night. There is not much to do in Biloxi except the casino, so New Orleans would be my choice. Let me know if you are coming to town, I'd be glad to show you around.