Truck lanes are just diesel. I have seen a few now with a CNG filling station, but not many.
I pull up to the truck pumps. I have both a pump start card for Pilot or my GS/Pilot charge account. With those locations I either start the pump, fuel up, pull forward and go in and pay, or just fuel up and I am done and can pull away. At Loves if that is my option I have to go in twice, but I dont run into a lot of issues with truckers. I go in, authorize, full up, pull foward and finish the deal. They seem to be fine with that as long as you dont block a lane once you are done.