Northern CA family riding and camping areas

[roverhybrids]

I'm looking for suggestions for family riding and camping areas in Northern Ca.
I've got a beginner wife(ttr-125le), 5 YO son (ktm 50 mini) and a 3 YO girl thats ready for the ktm mini.
My wife has a cousin in the SF bay area also with a family.

We recently all went to hollister and had a great time.

I'm looking for other riding areas preferably in Northern CA that are good for families and have camping.
We're considering Stoneyford. A lot of it is closed and not sure of which areas to go for the kids.

We also have some red sticker bikes so as we go into summer that is a concern.

Prefer something slightly cooler as imagine hollister and stoneyford are like redding a get into the 100's during summer.
And camping near a lake or stream for cooling off.