This is definitely worth the time and energy. I have tried multiple trucks and everything has been excellent. All the vendors are really nice and friendly.
My advice to you:
1. Park in the first parking spot you see. I think everyone must be soooo hungry they forget how to park...
2. Be prepared for kids and dogs.
3. There are a couple tables but those fill up fast. Bring a blanket or chairs. I had the brilliant idea to bring a sleeping bag. It worked out well because it adds a little more padding. :)
4. Go to Common Market to pick up some beer.
5. Wait. It might seem crazy but I waited about an hour to get a turkey burger. Worth every minute.