In the opening shot of what one presumes to be the territorial governor's mansion, the mansion itself looks like a post-Civil War plantation house. This impression is reinforced by the Spanish moss growing from the trees. Spanish moss doesn't grow as far north as Wyoming.
James Doohan and Ron Sobel are both veterans of "Star Trek: The Original Series". Sobel played Wyatt Earp in the episode, "Spectre of the Gun". Doohan of course played Lt. Commander Montgomery "Scotty" Scott.