I personally think that the tunnel is afar better route than the ferries, also £128 covers the motorhome and up to 7 passengers. If you are travelling with children the tunnel can work out cheaper as the couple of times that I travelled with the children on the ferries it cost me a fortune in meals. Also with regard to access to the tunnel there is direct access from the motorways both in England and France. You are on motorway within 5 minutes on disembarking the train. But as you say horses for courses.