It looks like Chris and I might get a ferry (with a cabin) there and back now, as we’ve seen a deal on Lastminute where for £300 you get ferry rides each way, a train ride across Denmark (so we’d get to see it from the train), 3 nights in a 4 star hotel. We’re rather pleased at the oldfashionedness of this plan.
(Though I still want to get a hovercraft to Malmo, just cos).