Traffic is disastrous should you choose to park prior to the fireworks and then leave. If you are staying or living within 5 miles, biking or walking is highly recommended. Unless you get there early for the fireworks, plan on standing for the show.
There is the typical Japanese carnival food: hot-dog-on-a-stick, fried octopus, yakisoba, yakitori, potatoes and corn on the cob, various fried foods. There are carnival games. There are lots of Japanese teens in amazing outfits.
Entertainment depends on the time of day. In the morning on Sunday, there were dragon boat races. Later on, there were other contests. In the afternoon, there is music, then eisa dancers. Finally, the highlight of the festival is the evening fireworks, this year starting at 8:45pm. The show is impressive, especially because spectators are so close to the origination point for the fireworks. There are fireworks that make hearts and smiley faces, and lots of "ooohhh, ahhh" from the crowd.