I'm astonished how people feel able to comment that Huntercombe would be improved by putting sand in that particular bunker. I can't imagine anyone that has played it would agree. Playing somewhere like Berkhamsted or Kington, with no sand but plenty of (mostly artificial) humps and hollows as hazards, you realise that they add to, rather than detract from the short game options and, indeed, the challenge. I would go so far as to say that both would be lesser courses for the addition of sand. Which is not to say that sand, when used well, is not an excellent hazard. At Muirfield, for instance, there are dozens of bunkers and it is a very great course, because of that bunkering. Sand is just one of many possible hazards, though, and is absolutely NOT essential for a great golf course.