I can sometimes hear a Baton Rouge accent and even a Broussard (small town by lafayette) accent.

Absolutely. Well, I have no idea about Louisiana, but I can certainly tell apart a number of different central NC accents. Of course, it helps that I'm in a city in the middle of often very rural areas and each direction seems to have a different sound. It's amazing that I can drive twenty miles and feel like the accent is totally different. Of course, with my current job, they come to me, so that's even weirder.