I live in the middle of Ventura County and have a dear friend in Torrance who I don't get to visit or see often enough. From where we are, it's generall about an hour and 15 minutes to Torrance. Sometimes a little less, sometimes more. Depends what time of day, and of course depends on traffic.
There are some support groups you could join in advance of your potential move to ask more specifically about areas:
http://groups.yahoo.com/group/SouthBayAPFamilies (keep in mind there are three "south bay" areas in California -- SF, LA, and San Diego; this group is for the South Bay of LA)
http://groups.yahoo.com/group/NaturalParentingLA -- you'd need to check with the moderator for this group if it's okay to join in advance of a move to learn more about the area -- I suspect it would be okay
I have found plenty of likeminded people in Ventura County, and I believe there are plenty in the South Bay, too. I've lived in VC nearly 9 years. I joined this forum and some natural-minded groups in advance of our move to California (from Montreal, Quebec), and it helped me to get started learning about the area, and to start "meeting" people. Some of the first people I met after I moved where moms from this California finding your tribe forum, then I began meeting La Leche Leaguers in my more immediate area. I have some very dear friends here. In the VCAPMoms group, there are over 300 moms. We don't all see each other regularly, but it has become a valuable support community for the natural, alternative, NFL, etc moms in the area.
Hope this helps. It's fun to expound on our area. I'd be happy to answer more questions about Ventura County specifically.