Jac
I'm not sure where all of the N. CA doodle owners are located (except for you and JettsMom) but Fairfield/Vacaville seem pretty central. I found two dog parks there: Lagoon Valley and Janine Jordan. I'll make a point of checking them out within the next month or so and I'll provide feedback. (I can also check out any Sacrameto parks but that would cause some folks a lot of drive time.)
Diane