I get the impression that those who are supposed to make the rules don't know what the rules for this are ! The carnet bit would probably affect us, pulling two bikes behind the motorhome - unless the muppets get something sensible sorted. And they might - the need for Green Cards was removed a couple of months ago - but I'm not holding my breath.
My brother went over to Germany via Holland yesterday & we are supposed to be going mid-September, so he is keeping us updated as to the hassles etc. Seems P&O were making life difficult at Hull, stating out of date "rules" but they did eventually board a near empty boat "at their own risk" - I have not had an update on the arrival hassels in Europort yet, but he was driving non-stop to near Munich today & will probably arrive late.
I'll post an update if anything "interesting" crops up. At the moment I'm not sure I can be bothered with all this pointless, expensive testing malarky.