We did this route on the 11/10/2020
You can park where the trail begins, just leave some space for cars or tractors and you will be fine, then you will have to cross a farm, we talked with them and they let us pass (to be noted that they were just there working).
Till Derryclancy there is no path whatsoever, but it is not hard to reach it, from there to Hungry Hill there are some paths, that may be made by sheep or people.
Going back from Hungry Hill, I will suggest to follow the path as a suggestion, try to find the best route till Gortnarea, from there you will have to cross the river, and continue down.
You will be ending crossing at least a couple of fenced sheep enclosures, so try to not disturb the animals there.
Last part is the boggiest and you should cross a narrow river without issue until you get to the path again and to the farm house you started from.