What would they be doing for a living today?
1) Steve.
Two issues with Steve's occupation of a crop duster going forward in time. The first issue is that there are superior technologies and second is arial application of materials is considered less than environmentally friendly. Not much to do in the valley so I see him running a dairy farm.
2) Warren.
Still a conservation officer.
3) Sam Drucker. Yes, Frank Cady is dead but his longevity prompts me to take the stance he could still be around. Sam held on to his store (which had reduced its offerings the last 15 years) until the mid-1980's then closed up. He then went to work for the area Co-op which absorbed a lot of his farm related business. About the same time the US Postal Service eliminated the Hooterville ZIP Code from handling mail so everything goes through Pixley. Sam retires about 2002 and fishes for his retirement hobby. Has a great disdain for chain stores and bypasses the Walmart in Pixley for his needs.
I did the hard ones leaving the girls for others to comment about. Honestly, I see Betty Jo still with Steve but I am sure some have other ideas. I will comment about my own after I see others.