If you want to enjoy the full experience and avoid the crowds (as much as possible, not entirely), arrive at your homestay early afternoon. Sleep until dinner, which would be around 7:00 pm. Try to rest or sleep until midnight. Bring warm clothing even if you believe it’s gonna be warm – it won’t! It’s always cold and windy, as you’re waiting for sunrise at the rim. You will be lucky if it doesn’t rain.  Also bring mountain boots (specially if you intend to go down to the crater).