We have 5 rain barrels and when we first got them we simply placed them on the ground or, if in dirt areas, on top of bricks for leveling. They filled exceptionally well, but getting the last drop out was next to impossible. Unless we tilted the watering can on its side, which resulted in barely filling the can and several trips.
Well this year we decided to drain them and lift them up. In addition to a large watering can, we have 5 gallon buckets that we use when watering and now that the barrels are a higher, watering is a dream.