Where is a good place to have a picnic at in the Orange County/Los Angeles area?

Try your local parks such as El Dorado park in Long Beach. Or you can set up a picnic at a campground.

a couple of LA ideas are: the hollywood bowl, you can eat before and see some music after. the getty has fantastic views of the city and has a really great garden. I love pan-pacific park near the grove. and of course, there's always griffith park...

Laguna Beach and around Newport Beach. I would recommend the area around the Montage Hotel in Laguna Beach.