Heritage Park is a great park if you need lots of space for an event. In fact, lots of events are held at Heritage Park each year. There is a huge playground area with a huge wooden fort to climb on. They also have a big sandbox with more wooden structures.
This park has lots of room to roam around. There are walking/jogging trails too. Heritage also has a boat launch.
In the middle of the park, Heritage has decent bathrooms.
My only complaint is that there isn't much shade. In Louisiana, you need some shade near the playground area.