I was thinking more of the bagged option, really. The bags are easier in that you can roll them up and strap them onto a pannier rack.
As it stands, my friend and I have decided not to take the Dahons, as we can't guarantee that we won't get to the airport and have the bags rejected and have to pay excess baggage.
We're just taking our regular bikes, which is a shame as we will arrive about ten at night, then have to catch a train, then haul them from the station to the hotel. We're just using the plastic bag method, but even that, just unbagging and turing handlebars, fixing pedals usually takes an hour or so, and we can't afford to miss the last train to Munich.
Oh well, can't complain, really, seeing as we'll be touring, and that's the important thing.