I don't live in So. Cal., but have learned a little about behavior and habitats of herps. Actually burning or clearcutting often adds to the desireability of the site. In northern Michigan forest predominates over the land unless man or some natural calamity happens to change the ecosystem. Ecosystems in nature are always changing, not static, some not often, but some very regularly. For instance, our Jack Pine forests would burn at least every 100 years before man starting supressing fire. Fire leaves the landscape seemingly barren, but herps tend to thrive there because most prefer the habitat to be more open.
Very few snakes can make a decent living in an old forest in n. MI. As time goes by and man has had his affect on the land some species are moving north taking advantage of the new opportunities (eg: blue racers). I tend to take advantage of open sites to find, look at, and photograph herps in the wild. Snakes spend most of their time underground anyway. As long as they can find food, they'll be there.
I don't recommend destroying the environment for the sake of reptiles. As a conservationist, I want to preserve habitats. But I do alter some habitat on our property, so that it will be more favorable for herps. This springtime scene shows brush being cut to open up a small pond and wetland surroundings. Afterwards it was much better for amphibians, turtles, and natricine snakes.

TC