I have had a large South-eastern Tennesse garden or the last 20 years. Last year we organized a farmers market in our county and instead of giving everything away i sold a portion..enough to buy a new tiller wheeeee. my garden is 100x150 feet. I grow 15 varities of tomatoes, okra, beans. squash,peppers, and melons among other veggies. i have never irrigated before i "water" with a tank,roller pump an hose. i am told drip irrigation is much better than overhead watering. i have aquired a 500 gallon tank and plan to build a 10 foot platform on which it to rest. from there i am lost. i have a creek within 150 feet of my garden from which to fill tank. i also have pumping capacity to get the water from creek to tank. i need suggestions on the areas from the tank to my garden. oh yeah im doubling the size of my garden next year.(need to buy a used tractor) thanks for any suggestions on low pressure, gravity fed systems....thanks in advance