agree and disagree. you can't even say,
"cajun & creole" in the same sentence bc even they are different types of foods... within the local cuisine.
for example, in NOLa, when you eat gumbo, there's a dark roux followed by tomato, etc. but anywhere outside of NOLa in the Atchafalaya basin, if you put tomato in your gumbo, you'll get run out of town. the same is true for etouffee.
the john folse culinary institute is at nicholls state university, right on bayou lafourche. my cousin was a student there and i've met several chefs who've attained their degrees there.
they will tell you that what they learn is COMPLETELY different than other culinary schools... as real Cajun & Creole cooking breaks a lot of culinary technical 'rules.'
i was born & raised down here on the bayou. the food in houston isn't the same, and even the food in mississippi (natchez, mccomb, hattiesburg, etc.) is MUCH different. the closest cooking to NOLa cooking OUTSIDE of the state borders is in gulfport, ms.
now, when it comes to crawfish, these are the places where you can't go wrong:
1. Thibodeaux's in Duson, La. the biggest, best you'll get.
2. Crawfish Time in Lafayette, La.
3. Tony's Seafood in Baton Rouge, La.
4. "1921" in Houma, La
5. Cajun Crawfish House in Lafayette, La. Drive thru.
6. O'Cajun in NOLA east. the Vietnamese here do it RIGHT.

7. Cajun Claws in Abbeville, La
8. At my frat brother's house in Carencro, La. dude boils 'em up old school with a seasoning blend he created himself.

