I have a gas, select state water heater with a manual pilot. We will be away on vacation for 3 months and I am wondering the best way to leave the water heater. I plan on turning off the water throughout the house, but will keep the house between 55-60 degrees. Should I completely turn off the water heater and drain? Should I just turn it down to its lowest setting? Or can I leave the pilot on, but turn off the water heater so it won't continue to heat the water? If so, how do I do this?

Thanks... Keith