Season 2, episode 14, "The Runaway" I just happened to watch that episode last week, so it and Uncle Jesse's "Just a farmer" speech are fresh on my mind. Being a farmer myself, I especially enjoyed his speech.
Here is an interview that Tom gave a few years back, that I ran across the other day: https://www.backstage.com/interview/playing-catch-with-tom-wopat/ He wasn't as condescending in that interview as I've seen him previously, but you can get a taste of his feelings under the "A Smart Role" heading.