look up a company called 'dripworks' if you want to see some neat examples of systems and products.
You're going to need drip emitters that limit the flow to a certain GPH and are rated for the pressure that you will be puttin gon your system. For example, a rain barrel/cistern elevated 20 feet above the grow will need beefier emitters... but it will be a FUN project, enjoy. Pics!