"Im from North Carolina. I’m planning on traveling to a state where cannabis is legal. Am I legal to buy legal cannabis with a California marijuana recommendation and a NC ID or will I need my recommendation and a passport?"
A California recommendation will only work to purchase medicinal cannabis in California. Some dispensaries in California require a ID from here to sell you product, though this is in fact not what the law states. I would call the dispensary before you visit them to make sure this is not the case.
Perry Solomon, MD