No matter where I fuel, Pilot, Loves, Ta, Petro, Flying J .. I simply go inside and ask for the pump to be tured on at the car island and hand them my Comdata card. Some attendants are not aware the card can NOT be pre-authorized, but the managers always know.
The exeception is when fueling in Indiana, I can't get the tax free fuel in the front.
Be sure ask the fuel desk to ADD your points to the shower card, otherwise, (at the Pilot/J they awill not be there).