I just use a lent free classes bag with a draw string cord which is looped on to the ridgeline:
All these great ideas. Now I have to figure out which one to use.
I have a few small ridge line pockets made from left over silnylon from another project and they are great! I have glasses up there at night, phone, light, and my knife.
Some of my freight hopping adventures on film over at my YouTube Channel... Oh and there is other stuff there as well!