Hi Steve W
We have been on Norfolk Line twice now. Apart from the lovely boats I have found them very helpful. In 2006 we had a breakdown and had to change our homeward sailing. Phoned them and they said just let them know when we wanted to travel - phoned up and they fitted me on the boat I wanted even though busy weekend and no extra charge. This year homeward, unexpectedly, had son with us, he had flown out to join us. Declared his presence at check-in expecting a surcharge, no, "nothing extra to pay sir".
Lovely well designed boats. We "run" to get good seat in the restaurant lounge right over the bows. Great view, great food.
Regarding staying at Dunkerque not sure about the docks. On the way out we have travelled on the 4.00am ferry - cheap and gives us a full day's drive. Both years we have been travelling down to Italy via, Belgium, Luxb and Switzerland. We stop of at the second autoroute aire, (first aire was being rebuilt and so a construction site( where there is a large carpark. We have then slept peacefully in the caravan for a few hours before getting in a full day's driving.
The only disadvantage for us Merseysiders is the journey to Dover, especially the M25 part.
Norfolk Line for me every time.
Tim