Originally Posted by Machka
I picked up my poncho at Canadian Tire for about $7.
I've hauled it around with me on most of my rides for the past 2 years, and have used it frequently. I wouldn't travel without it. It can be used on the bicycle in the lighter rain conditions, as you mentioned. I can slip into it when setting up camp in the rain, so that I don't get wet. I can wear it around camp when slogging back and forth to the toilets or picnic shelter, so that I don't get wet. When I take a day and go hiking, it is a valuable tool to bring along in situations where there is changeable mountain weather - it is smaller and lighter than a jacket, and will probably keep me drier. I've also used it as a ground sheet when I want to take a nap or sit on the side of the road.
You might check a camping/outdoor store like perhaps REI.
You should check out Josie Dew who finds her cape invaluable when she is caught short and needs to pee away from public view. Her books are well worth reading.