One can find a lot of information about trekking poles/staff/sticks on the web. I read its use and importance from different websites. This May I tried this idea of using a walking stick and found everything true about its importance.
It gives aids in ascending and descending. But one thing which I discovered about its use is shown in the photo.
I tried an ordinary bamboo stick. I stabbed it on the muddy waysides and got it fixed upright. Then I hung my camera case over it. This reduced one bag from my shoulder and enabled me to use my hands freely for taking photographs.
Due to this technique I kept my camera case dirt free which would have become dirty if I had put it down every now and then.