I've only done one trip requiring supercharging so far, it was from San Diego to the Bay Area and back. For anyone not familiar with the I-5 on this route, there are really no towns but rather roadside clusters of restaurants and gas stations at the highway intersections. I had never noticed it before, but these areas were definitely not designed for pedestrians. The absence of crosswalks and sidewalks, along with the large number of cars and trucks plying these roads, made for a much less than pleasant walk.
That said, for me the ratio of time spent supercharging to time spent driving is about right, and helps keep me fresh on a drive like this.