I ended up getting an inexpensive one at Farm and Fleet. Better then nothing. Lightweight too. I took it out of the plastic bag it came in and put it in a heavy duty ziplock bag. It's kind of a reddish orange color. The brand is something called TexSport. It seemed a little heavier duty than the Coleman emergency ponchos that were a dollar or so less. I tried in on. Like most lightweight ponchos, wind is going to be an issue, and so is dealing with water running off the poncho unto my pants. But, it is a partial solution.

I got a coleman brand space blanket too.

Neither are especially heavy duty but it's a whole lot better than nothing, especially as fall approaches and rain becomes a very serious hypothermia issue. I am not going to deliberately hike in the rain, but you never know.

It is not going to be useful over the pack so I need something to cover the pack. Not sure what is good for that.