I just finished a trip from Kansas to Louisville KY and return. Had no problem with fuel -- all stations I stopped at (8 overall, all different) had ULSD. Pilot had B11 as the only diesel available - put that in and truck ran fine -- wife actually commented that it seemed quieter as well. However, only 2 tanks run , both middle of the drive so it was well diluted both before and after (I filled when 1/2 tank indicated -- worked out well because all of us needed the stop at those points
... ).