Many New Orleans weddings take place in two locations so guest transportation becomes very important in this city. Parking is at a premium in New Orleans and hard to find, so check out your options to make getting to the wedding locations easier. For smaller, intimate weddings, your options are a taxicab, limousine or even pedicabs. I've had several couples book multiple pedicabs when traveling between the ceremony and reception. It's fun and a great way to interact with the locals, get the scoop on what's going on. If you are planning a larger wedding there are several bus lines you will find are great for getting you there and back.
Here are a couple links:
NOLA Pedicabs
Hotard Bus Company