The smuggling aspect isn't that hard if your only taking a very small amount. I've flown with a couple grams folded up inside a cigarette wrapper and hid inside the lining of my wallet on several occassion and have't had a problem, but you need to keep in mind that you aren't dealing with state regulations when your on a plane, your dealing with the Fed's. If you do get nailed it's a Federal offense, and since the Fed's don't recognize the states MMJ laws your perscription isn't going to be much of a defense.
Just a side note- My brother in law just took a cross country bus trip to see his family last week (he hates flying), and halfway through Kansas the Highway patrol showed up and searched the bus with dogs while they were at a rest stop. My brother in law had his stuff in an airtight tube we got from a local dispensary, and the dogs didn't alert on it even though they went right by the bag he had it hidden in. After he filled the tube at home he washed the outside completely with soap and water (to get rid of any smell of pot on the outside), so apparently the air tight part of the tube really does work.