^^ yup.
Also check city and county law. Oakland, CA allows 3 lbs personal with a medical card. There are a lot of places in WA state that you'll get arrested for it in your car just because they want to nail you with a DUI ticket or some such nonsense.
Wish I was kidding.
Def know your laws/zoning/ordinances locally. Probably wise to roll with a radar detector at all times, too. Don't be too cowboy about it... just my take. Remember, cities control mj dispensary licenses in CA. They like the tax $ and control. They don't like the cowboy craigslist underground that way.
Again, just my opinion. Know the rules from bottom to top. You know the Feds don't approve but they're not your main threat. Its all about local.
Everyone needs to remember there are a whole lot of cops, prosecutors, and judges that didn't get the memo and cities love criminal justice income, even though its 2013 and you're in a medicinal state.