You can tell when the Huon Valley is in its sweet spot. The river sits low and calm, the orchards look heavy, and by late afternoon the better cider houses are filling up with people who've already had a proper lunch and don't need convincing that apple country is worth the drive. If you're staying at Riverfront Estate, this is the easiest kind of day out to do well, because the cider circuit is close, compact, and tied to the valley's real farming base, not a tourist gimmick. Table of Contents Why the Huon Valley Is Tasmania's Cider Heartland The Four Cider Houses Worth Knowing Willie Smith's Apple Shed is…