I did Stob Ban and the Grey Corries a couple of years ago. As mentioned in a previous post it's a canny hike. But if I can do it , so can you
You can take your car ( carefully ) all the way to a fence/gate if I remember. The track isn't too bad. Been up worse.
Descent and ascent from Stob Ban is relatively straight forward. There after, it's just a long walk