The last post jogged my memory…
Lake Del Valle near Pleasanton/Livermore. It’s part of the EBRP system. There is camping, hiking, swimming, small boats, kyacks.
A friend just took his 3 school aged g-kids there for an overnight and they had a blast! Close yet you would never know!
You probably already know this but remember that most places suggested need reservations…and the time is short for Labor Day. The best sites at the National Parks like Yosemite go they day they are released months in advance, the same for CA State Parks. Some smaller, less known SP are first come first serve, also many National Forest campsites, too… but these tend not to have full amenities (hot showers, flush potties). Others have amenities like BEARS! We had bears in our campsite every night when we camped at Lake Tahoe. It a little frightening to hear and feel snuffling along the side of your tent, knowing there is just a little piece of fabric between you and … Luckily we keep a clean camp and everything was locked in the bear locker! Not so with our neighbor campers that chased the furry friends our way.
Have great time in the great outdoors!