For me, the concept of a Road Trip meant finding an optional journey taken for one's enjoyment rather than a necessary one taken because of a job. This ruled out a couple of things like the constant business traveling in Spice & Wolf.
So, what was left? One of the greatest road trips in #anime history! That of Frieren and Fern starting on their "mere ten-year adventure" to find the place where one could speak with the dead that Frieren's mentor wrote about 1,000 years earlier.