I take umbrage with your characterization of truck stops; not ALL are garbage-strewn slime pits filled with the dregs of humanity, there are a number of Sheetz that double as truck stops and they are kept just as clean as any other Sheetz.
I was referring to Circle K, not all truck stops. The Flying J is very clean, and as you pointed out, The Sheetz that are on the major highways are truck stops with separate bays for the 18 wheelers, and are clean.