Combine the vanilla with the brown sugar. Then add the rice, raisins, salt and cinnamon and mix through. Put this all into a baggie to take along on your camping trip.
At the campsite, put the two cups of water in a pot and add the rice pudding mix to it. Bring to a boil and then simmer until the water is absorbed (about 15 minutes). If the rice needs to get plumper or softer, you can add more water.
When the rice mix is ready, stir in the milk and cook uncovered over low heat for 30-40 minutes, stirring frequently. You are looking for it to be thick and creamy, but not too firm.