If I want to be near the ocean:
Refugio SB just north of Santa Barbara.
Kayaking, sufing, hiking, bicycling, great beach in a cove, grass for kids, one concrete basketball area if so inclined.
Morro Bay SP
Lots of trees, across the street from the bay, Kayaking, surfing, bikes, hiking, etc. Some 3way hookups, some limited hookups.
Off Hwy 50, above Placerville
Warm, shallow lake, Great for kayaking, relaxing, hiking.
Off Hwy 50, above Pacerville
Larger alpine lake, can be good fishing, lots of granite. Deep lake, cooler for swimming but not bad in late summer. Beautiful area. Wind can come up on the lake in PM, affecting paddle sports.
East of Fresno. Nice, fairly large lake with fishing, boating, bike and hike. Lots of pines. Quiet.
I have more, those are my favorites.