I have lost my #ApplePencil for the LAST TIME. Behold my clever solution! The most difficult part was figuring out a way to affix the lucet cord to the pencil without interrupting the magnetic contact and thus charging capability. Rubber band was much too thick. A single layer of tightly-wrapped sewing thread is just thin enough.
Very lucky my iPad case has a little gap of wasted space next to the pencil-holding trough. Drilled hole, poked cord through, knotted.