Where is the picnic area?

Rangers at toll booth can direct you

There are some along 250 and some in the camp grounds

You have one over at the rest stop

Cables all over the area but by the snack bar and by the swimming area are picnic tables

There is a snack bar near the swimming area with picnic tables. There are also picnic tables in several random places on the grass near the swimming area. And you can just bring chairs & a blanket & picnic under a tree or wherever.