Spruce Knob sounds like a place I visited once too. I'll never forget it...ever! Nor will I ever go back...unless it's on foot.
Hiking up that kind of road wouldn't bother me a bit, but driving in two direction traffic on a road wide enough for one...no way! We weren't even there long enough to appreciate it; we were just looking for an overnight camping spot.
No place to turn around either...you must progress all the way up, whether you want to or not.
It sounds like you enjoyed it at least.
Pictures when and if you can, please.