I'd like to see Lori Saunders and June Lockhart introduce some later episodes and speak candidly about the void left by Bea Benederet's passing. I was an avid fan in the show's entire network run and feel rather wistful about all the turmoil of the color years.
And the color seasons were certainly filled with change. Season Three was the only season that saw a continuation of the format found in the black and white years, but starting with Season Four, the show evolved from year to year. Season Four saw the introduction of Steve Elliott as a love interest for Billie Jo and the focus shifted a bit to make room for his character. Season Five saw the unanticipated switch of Steve's affections from Billie Jo to Betty Jo due to their real-life romance, and their whirlwind marriage. Betty Jo left the hotel to set up a love nest with Steve in that abandoned cottage in the woods. (I kept looking for seven dwarves to come home and find them.) Kate's illness became apparent late in the season. The newspapers were filled with reports of Bea's battle with lung cancer as the writers sent her off to visit her aunt, hoping fans weren't reading the Hollywood columnists.
Season Six was the traumatic season: Betty Jo had her baby in Bea's last episode. It wasn't her last appearance, as she's obviously doubled by her standin with Bea doing a voiceover from her hospital bed. I remember seeing the episode which aired after her death and feeling so sad on an episode in which the characters are supposedly filled with anticipation and joy.
There were two or three episodes in which Edgar Buchanan was given solo star billing before June Lockhart joined the cast as "our lady M.D., as pretty as can be..." (it was a different era... Petticoat Junction often felt like the 1930s actually.)
The main thing I remember about Season Seven was that it seemed like things were quieting down again as Lori Saunders was given more to do with her new boyfriend, Orrin. It seemed like the Shady Rest was ready to be turned over to the next generation as the three girls were now three grown women.