The New Orleans Pelicans played in Heinemann Park (also called Pelican Park) from 1915 to 1957. There was lots of great info and pictures online, including
this article on the SABR website and a PDF summarizing the history of the park.
Updated v1.2 of the Pelican Stadium file, which should actually work for crying out loud
I ended up shooting for a late-20s appearance, at least in terms of the grandstands and seating. I did a bit of a nod to the neighborhood around, including putting in a canal, railroads, and a filling station right next to the park, but I was going for look-and-feel rather than exact work. Given the amazing work done by so many of the modders I'm a bit embarrassed to post all of this, but I figure maybe I'm giving hope to the newbies.