Connecting to Homeschool groups

How do I connect with homeschool groups? Or which groups are active in North Oakland and Berkeley? We have a thriving Emeryville 4-H Club with lots of hands on learning projects (although no big animals, like 4-H at the County Fair!) - and we would love to include homeschool families in this low-cost, community-based approach to building hands-on learning and leadership for youth.