I'm from Shreveport.
There is/was a huge contingency of people in PR that went to NSU and LSU in the 80s and 90s. Growing up, they were everyone's favorites. I've been away for around 10 years now so I'm not so sure if this is still true. A lot of fairly prominent instructors came from this lineage: Hurley, Prosperie, Wooton, Vasquez, etc.
Also: http://www.louisianadrumcorps.org/index.html