Cheers dw, the car's been standing since late December, so will be nearly 3 months when we start it. Been under cover, and the winter climate there is OK, so should be fine. It's only a couple of years old, done about 15k, but we'll check it over.
BP's sister has been "adopted" by several neighbours so we'll have plenty of willing helpers with the practicalities out there. BP has already got sister's laptop etc. passwords so we'll be able to do the internet stuff. I've already bookmarked directferries website, for Grandi Navi Veloci.
The more I look at it, the more appealing option is flying out, shipping the bulky stuff, and driving the 107 back with personal stuff - papers, laptop, etc. Cost savings on not taking the Bipper out and back (ferries, hotels, tolls, fuel...) should easily cover shipping of the rest of it.
Keep those thoughts coming - you're putting down on paper all the stuff that's floating round my head, and more.
(trenchfoot - the Beluga flies to the Airbus factory at Hawarden, north Wales, taking wings to France. It goes low and slow and fairly quiet.)