I have two rainspot locations that I thought I would put a series of 2-3 barrels each location to allow overflow from one to the other and the gravity feed from barrel into my drip lines...
I take it you live in a area where you get summer rains? You should probably filter the water going in with 1/4 or 1/8 mesh wire screen. Is the top open so you can dip it out into a bucket and how big is your garden...