The difficulty in advising is that weather is messy, and things depend upon weather, especially at this time of year. Probably sometime between Sept 12th and Oct 4th (that #2 mentions) there will be a heavy snowfall, and quite a few seasonal roads, and the delightful areas they access, that were open when you arrived will close for the winter. Indeed one or two of the most remote roads might already be closed before you arrive. But of course no one can say precisely when this snowfall will happen. Whilst the snow will melt, or not even land, in the milder, lower coastal areas, further inland and higher up the whiteness will persist till the following spring. But there is plenty to amuse you in the coastal areas, between the rain and the wind.