[Cali72K20]

Good thread, I have been thinking about this too. With the estimated cost of a California cover:

http://www.calcarcover.com/n_carcovermaterials/All

You could get one of these for around the same price, if you have room:

http://www.bizarkdeal.com/10X20ft-Ou...mpaign=product

http://www.harborfreight.com/automot...age-69039.html