When Lucy, played by Charlene Tilton, comes to visit Mickey while he's shoveling, just as she's about to walk into the shadow of the stables, observe the left upper corner of the screen. A car zips past at high speed. Clearly not a Southfork farm vehicle, but a real-life passerby on some main road. The stables are, in the story, supposed to be fairly near to the ranch building. Walking distance, for in some fairly recent episode, Miss Ellie was seen ambling along there to look in on Jock's horse. The aerial views of the layout often seen in the series do not show any indication of the stables. The location for filming the stables are clearly far away from what stands in as Southfork ranch.
Pam says to Cliff, "You've never seen him (Christopher), your own nephew." When Pam first adopted him, Cliff visited them on Southfork.