Last weekend, in preparation for the rain, I executed a plan I had thought up a few months ago ---- buy a narrow garbage can and have the downspout pour into it instead. So I bought this "slim jim" 23 gallon can from Home Depot:
So, to solve this, I drilled a hole in the lower side of the can, installed a ball valve hose bib. A standard hose bib fits a 1" hole pretty well. With some silicone, washers and a nut on the back side, the drain valve seems pretty sturdy.
Next, I took some old hose, and made a new hose out of with a replacement hose attachment:
Now, the slim jim can collect 23 gallons of water, and I can then turn the valve and pump the water anywhere within 15 feet.
In the future, I'll build a more decorative box around the garbage can. And, when it's not rainy season, I'll disconnect the hose and store in the shed.