The ranch activities they circled on their brochure are: Map Reading (Castle), Hog-Tying (Beckett), Harmonica for Beginners (Castle), Cowboy Saloon (Castle), Gunspinning (Beckett), Western Dancing (Beckett).
That's why Castle was in the Saloon. Castle plays the harmonica (which he just learned) at their campfire. Castle is carrying the map when they go out searching, and he says "according to the map" so there's a reference in the dialog, too.
Beckett's black costume looks ideal for gunspinning, which she eventually demonstrates. No apparent sign of Western dancing. She does lasso Castle, which is probably a family-friendly nod to hog-tying, but "lasso and roping" was a separate class on the list.
That's why Castle was in the Saloon. Castle plays the harmonica (which he just learned) at their campfire. Castle is carrying the map when they go out searching, and he says "according to the map" so there's a reference in the dialog, too.
Beckett's black costume looks ideal for gunspinning, which she eventually demonstrates. No apparent sign of Western dancing. She does lasso Castle, which is probably a family-friendly nod to hog-tying, but "lasso and roping" was a separate class on the list.
Although Kate called Castle Mr. Beckett and Castle still called her Beckett, in this episode, whenever she picked up the phone, she never called herself Beckett.
Beckett is no longer wearing her engagement ring, she is only wearing her wedding band.
This episode is a huge nod to the Western style represented in Firefly which starred Nathan Fillion.
Rattlesnakes are cold blooded and would not be out in the desert at night.