1. Be at Huanglong early. Before lunch and have lunch packed. We reached there only at 3 plus in the afternoon. There was no way I could have made it to the top and be back down before the place is closed at 6 plus. I met a couple at 5 pm as they made their way down, they started the climb at 1 pm.
2. Similarly, be at JZG as early as possible, pack lunch as suggested. Unlike Huanglong where it is a single way up/down by foot (discounting cable car where there is nothing to see enroute), buses bring you to places in JZG, it may be necessary to allow 2 days in order to cover adequately and leisurely, influence of weather not considered yet. Hopefully the crowd really dwindles by Nov as it would be quite a task to have your family getting onto the crowded buses.