Simple but sometimes overlooked a quality flashlight with spare batteries gloves (at least 2
pr) a headlamp for hands free work in the dark (& spare batteries) a reflective vest can be a real life saver!
I haven't used a cb in years but it could really help out a new driver for asking directions ectra.
A good 3 season sleeping bag, mines just lays there on top of my mattress as extra padding until the night I'm broke down with no heat and it's -10 degrees outside.
can't really think of much more "gear", tons of other stuff like bungie's lightweight straps, trailer airline spring, that list goes on and on andon.