I am a solo backpacker typically. Much of my time is spent in the southern mountains. Places with little to no foot traffic and/or cell service. I have debated the pros/cons of carrying one over the years but am getting ready for an upcoming trip. I am leaning towards carrying one going forward but my biggest concern is this -do these things work under the forest canopy? Or do you have to have open access to the sky? I am not near any type of retailer to go see and discuss so I am seeking info here. The stuff I have read elsewhere has mixed opinions on this. (Hard to believe that on the internet, right? ) Thanks in advance.