What part of the bay area? There is not a lot around here. Frank Raines is cool. Hollister is cool. Carnegie is worth it if you live real close or are driving by. Look into the trails around big sur. Tons of wheeling within a few hours drive, but not a lot real close. Be sure to check out Oceano Dunes SVRA. Drive and camp on the beach, get stuck in the sand, lots of fun. Get there before they close it for good someday.

Remember you are an ambassador and representative of all offroaders when you are out there. Stay the trail, don't litter, etc.

If you have a family, use offroading to enhance hobbies they already enjoy. Fishing, shooting, camping, hiking, photography, playing in rivers or streams, you can get to better spots to do these with 4x4, and endear the family to the hobby in the process.

Have fun!