Sleeping in the vehicle is another matter; but since it's not obvious someone is sleeping in the vehicle, I suspect one can get away with parking legally and sleeping illegally enough of the time to make it worthwhile (if a ticket for sleeping in the vehicle costs, say, $75, then as long as you don't get ticketed more than once every three nights, you'd come out ahead over an RV park). There are other benefits to RV parks, including the convenience of not having to run the generator for power, not having to dump and refill water, and probably having better Internet, so I'll probably end up staying in parks about 75% of the time. I'm paying $41.50, including utilities and Internet, per night here in Morro Bay, and this is a pretty pricey area; my house in Mountain View cost $71.50 per night, and didn't include utilities or Internet. So, I'm still coming out way ahead.