I have never hiked with hiking poles and have rarely (but not never) felt like they would be worth carrying.
I usually hike with a tarp and attach it to a tree or stick I find along the way. If the stick is not great, then my shelter is not great that night. I could use a pole.
I always want to carry an unbrella, but I am usually disappointed when it does not rain and I carried it for nothing.
Is there a way (or even a product out there) to combine the three? I imagine that I could get something pretty light combining these three uses without spending an arm and a leg. Does this thing exist?