Kathleen Hite is one of my favorite Gunsmoke writers, and, in my humble opinion, after she and John Meston left, the series lost a certain spark. Long, Long Trail makes great use of the longer format, which began with the seventh season, with never a padded moment or unnecessary scene. Barbara Lord is excellent as the slightly haughty yet likable Sarah Drew. As the episode progresses, she changes from a woman intent only on her own wishes to one who puts others first. I do question the insertion, and necessity, of the romantic overtones that grow stronger as the ending nears. As for a lack of emotion on the part of Matt near the last scene commented on by another reviewer, I see his point and yet, so many emotions chase across Matt's face as he looks around him: loss, grief, futility, questioning, a dawning of understanding, all are there in brief glimpses. It's certainly not a firestorm of emotion, as when he is angry, but a far subtler performance and one that fits the character's stoic temperament.
Now for the one flaw, which is pointed out by others, the complete absence of Miss Kitty. It doesn't feel right for Matt and Sarah to be eating dinner together without even a mention of Kitty. If only there'd been a reference to her taking a trip or some other excuse for her to be away from Dodge. And, of course, if she'd taken a stage ride somewhere, that would set up the next week's episode nicely as any fan of Gunsmoke knows that Kitty and stage travel are bound to lead to calamity.