This episode takes place no earlier than 1869 as it's mentioned in the dialogue that Ulysses S. Grant is President of the United States.
Wally Cox is best known for his riole as meek school teacher Robinson Peepers in Mister Peepers. It's essentially the same role he plays in this episode.
Hawks: (to Wooster) Why you grubby old fleabag, you've never been inside a school in your life.
Flint: (to Adams) You'd be the first wagonmaster in history that had a travelin' school goin' along with the train. Might look pretty good come next fall.
Erika: (to Vincent) I admire men who use their heads. The only men I know are interested in peddling merchandise or use their hands.
Adams: I'll give you just exactly 30 minutes. If you're not back here by then we're comin' in after you.
Vincent: Please do.
The stand-in for Wally Cox is several inches taller than the actor and it shows in the long shots.
It's never explained in the dialogue what the Navajos are doing 200 miles from their natural habitat.