it took me 12 hours of pretty non stop driving to get from calis to hotel Alexander which is around 50miles over the border into Greece. the trucks when the roads are wet come to a near stop on the hills and as you are steeering the car (uk right hand drive)wrong side to take every advantage to over take,also road works and ferry and customs will take their time. crossing Greece we started around 9.30am straight onto the best road in the area (new motor way paid for by EU don't get me started)when we did this their were no motorway services at all, and you will need fuel so watch out for small signs put up by local garages just of motorway. we detoured to see the monasteries on the hills and a cave system which took us under ground for around a mile. Driven twice to Calis from uk and enjoyed the trips, making the trips part of the holiday,sights include Spa, porche museum, ferarri museum, zepplin museum,lake garda, venice,rimini,lake constance, etc do you own trip plan well make the trip part of your holiday not a race or a chore.round trip is around £2800ish depending on where you stop and your cars mpg including hotels takes around 5 days each way.you will need at least two ferries booked in advance.