I don't want to jinx my self, but in the two months, I'm yet to encounter any problems with authorities or parking. I think it was definitely a wise decision going with the incognito minivan instead of a camper van and I keep her as innocuous looking as possible.
Also, you'll learn pretty quickly what establishments mean when they say "restrooms reserved for paying customers only." They are generally saying the restrooms are for paying customers OR those who look like they could pay, so even my pajamas now are fairly respectable looking, just in case I need to make a mad-dash for the nearest establishment.
Denver Hayes? A solid friend to make if you are a corporate lady van-dwelling: collared shirts, wrinkle resistant.
I find that parking under streetlights is often a safer bet, because then no one notices any flashes of light that may escape your window coverings. And also, my goal for March was no parking tickets (after the debacle that was the entire month of February) and so far so good. I've been diligent with sign-reading, metre-paying, and spot-switching.