I have read your story while flying the long stretches in the current Rare Goods CG. Back in Olelbis I realized there is a Moon near one of the Gas Giants with apparently similar size as Charon. The scenery is great with the Ring close by and all. But the moon itself seems pretty rough. Hm …
And it took you nearly three days real time? I'm tempted but I'm afraid I cannot muster the patience.
I did the whole trip in VR and was concerned at the start about motion sickness and if that would be a problem. It turned out not to be.
I guess you can get used to almost anything so that even when traversing the worst ground in mountainous areas, where I often would spin round 360 degrees just by going over a ridge/bump, combined with extreme up-and-down motion, I experienced no trouble. The worst times for motion sickness were in rough areas when I was driving after just having finished a meal
I don't know whether this helps anyone, but if you had kept a constant bearing of ~222 you would have arrived at your antipodal point without having to check your bearing very often.
The route might have been a bit further because the it is not a great circle, but a rhumb line.
This website will calculate all your bearings, both great circle and rhumb line very easily. I have used it find a bearing to given points on planets quite a few times.