Probably because in the overall scheme of things, the RV fuel market is relatively small. At any larger station like a PFJ, Loves, etc, count the number of cars at the gas pumps and trucks at the diesel pumps compared to the number of RV's. Flying J has had dedicated RV lanes at most locations for years, although some could have been laid out better for longer rigs. But they're about the only one that has seen enough value in the RV market to make special accommodations for us. On the other hand, our rig is 55' long including the toad, and I've rarely had trouble finding stations that could accommodate our gasser. End islands usually work best for us.