I think most defenders of Davis are going to be government employees fearful for their jobs or recent salary increases. They can pretty well be relied on to turn out no matter what.
With the balance of power in the legislature being what it is, I seriously doubt environmentalists have much to fear from a new governor, even McClintock.
D
As I understand it, the California governor appoints a lot of the bureaucrats who run the various commissions that are involved in the process. The commissions and the whole permitting process is where environmentalists wield their power. It might make more difference than you think.
Then again, it may not matter. Nobody is going to talk about that issue during this campaign, so there's no assurance that any changes will be made.