Zydeco Marathon is a great small town race in Lafayette, LA. It's a good size, not more than a few hundred full runners I'm guessing, with maybe two or three times that number in the half and other distances. It's well organized and well run on a decent course. The city itself has lots to offer in terms of lodging and restaurants, and if you have the time it's probably worth spending a day or so trying to hit a few local spots.

Pro's: Good communication leading up to the race; they even mailed "in training" soft cotton t shirts out weeks before the race. Great surprise!
Decent expo, efficient packet pickup day before, and offered day of
Nice medal and shirt, and a second medal for age group awards
Very well marked course with plenty of volunteers and police
Lots of turns - I was worried about this going in, as a misplaced cone could screw the distance up (like in Chattanooga their inaugural year), but they nailed it and it actually kept things interesting
Decent course - some nice areas, lovely neighborhoods, around the university. Not bad, and only small hills
Generous beer and food tickets
Staggered start
Great weather - cool, overcast, and the threatening rain never came in
Lots of water stops!

Con's: not a lot of these
Some bumpy roads out there, watch for potholes, but not the race's fault
It's southern LA, the weather could do anything
Because it was cold and windy, hanging around the finish area wasn't going to happen; space blankets would have been nice

Overall: I thought they did a great job with the race. Number one in my book is correctly measured and marked, especially with lots of turns, and they definitely accomplished this. They kept runners informed leading up to the race, the route never felt too crowded and there were plenty of police and volunteers along the route. Great attention to detail. I'm guessing this RD makes his race better and better each year. I'd definitely recommend it for Louisiana.