Guest star Rebecca Schull had earlier been a regular cast member on Wings (1990), a sister series to Cheers (1982) and Frasier.
Frasier (Kelsey Grammer), Niles (David Hyde Pierce), and Martin (John Mahoney) are travelling southeast on The Old Oregon Trail (I-84) to Sun Valley, located in south-central Idaho. At one point Niles comments that he's calling from a "Little Red Cabin" in Baker City, Oregon. In other words, they cross into Idaho at the Oregon border, which would put them in the Mountain Time Zone.
Guest starring Primetime Emmy winner Anthony Zerbe. He won a best supporting actor award for his role in the 1970s detective series "Harry O."
In the earlier episode "A Tsar Is Born," Martin (John Mahoney) shows Frasier (Kelsey Grammer) and Niles (David Hyde Pierce) a picture of the motor home he is buying: it is a Class C cabover type. Basically, its living quarters are built onto the main chassis of the van with a sleeping compartment atop the driver's cab. However, in this episode, Martin's "RDWRER" is a class A motor home -- much larger, entirely self-contained, and certainly more expensive.