You have to wonder why Rockford didn't move the trailer more often to avoid various bad guys. I mean, it's a mobile home.
Well, once you have a prime spot right on a Malibu beach, you probably don't want to give it up!
Although I do remember one episode where he took it out to the woods to hide out from someone.
If it's the one I'm thinking of, a great two-parter called The House on Willis Avenue, I'm pretty sure they took it to Franklin Canyon (AKA the Miramanee planet):


I never watched Murder, She Wrote back in the day, because I thought it was for "old" people, but now I've been catching it on CoziTv and it is a bonanza for guest stars from earlier generations. Plus William Windom had a recurring role, how can you go wrong. Here's a two-for-one from 1989, Marj "What is Brain?" Dusay about to be questioned by Morgan Woodward (Gene Barry/Bat Masterson is a non-Trek bonus):
