There is a picnic area?

Picnic outside, not inside.

There are a bunch of places with benches and tables where you can have a picnic.

Outside there are picnic tables but they dont allowed outside food inside the gardens

Outside of the park itself are a bunch of tables

Yes but outside the gardens.

Yes it's a good place for a picnic.

Yes there is

Yes

Yes. It is located to the west of the entrance area.

There are some picnic tables to the right (as you drive in) of the parking lot. I don't think they let you bring food into the gardens.