Hey all, thanks for this! Sorry, I replied earlier via mobile and missed many of the comments!
Yes, pushing it is is not an option, so we have got a hand winch, just in case the car's not running when it goes in... We hope not too, but it's realistic to plan for it!
The next option is to reverse it in until the rear wheels are in i.e. the heavy bit, then push/winch it from there, possibly with Oscar steering, just a bit of a jump to get out. Then when we get off the ferry the other side, find a lamppost or tree and winch the front end out, climb in and drive the rest out.
Andrew's been amazing and built proper fitted ramps, so there's quite a step that will hold the car half in/out if we need to do it this way.
As for the rear window, I've cleared out all the toot from 32 years around the seal now, which might've been holding it in place, but I'm not very brave as to the pressure I need to put on it - using my feet sounds pretty drastic indeed!! I really can't break the screen now as I have no time to get it replaced really and I think the sound of plastic sheeting flapping in the wind for 2,500 miles might get on my nerves a tad...!!

Lina