I followed this route last week. I think the description "Continuing up the mountain the trail crosses the same 4-wheel drive road and after a short distance, again meets up with the road but this time the trail makes a sharp right and follows the road until it reaches a locked gate"
should say "sharp left" which is consistent with the 2.2 mile description and what I did last week. I left your route description at my hotel by mistake, and almost missed this left turn. As I proceeded up a bit, I was unable to see the next cairn, and eventually spotted a cairn marking the left turn that gets you to the road.
Thanks for the update LarryN. How was the weather? Did you take any pictures?
The weather was relatively nice until I got to the crater rim, and ok until the summit. Then there was light to medium rain for much of my descent, with temps in the 40's. I was able to see at least one cairn during my descent, and normally two. I took some picture and will post a few this weekend.