DCL no longer picks up passengers at the Swan/Dolphin to go to PC, so I would find it doubtful that you could get dropped off at either hotel. As far as I know DCL only runs its shuttles to (and from) PC from the WDW resorts and MCO (and by extension, the airport Hyatt).
That said, you could still pay for DCL shuttle to the closest Disney hotel, which would be either the Yacht Club, Beach Club, or the Boardwalk. Then take a cab to the Swan/Dolphin.