Hi,
Car travel can be a massive struggle somedays. Few things that helped me were
Lumbar support
Rear vision mirror (a big one) reduces neck movements
Blind spot mirror on side rear visions, again reduces movements/shoulder checks
A rear view camera or sensors
If you can, consider a SUV shaped car. Getting in and out of a sedan (bend, turn, twist, fall back on bum, twist in... ouch) was and is the worst for me. I trigger pain in the process and hence start hurting before turning the ignition on.
I have been on a hunt to get customised head rest, but haven't had much luck so far.
Somedays i would wear compression bands on elbows or knees or wrist while driving, especially when doing long distances.
Switching to automatic transmission has been a life saver. Hope that helps.
