No - i am not mad!!!! Dh and I just inspired by a fabulous trip we have just done to the Loire ( 6 hours on french soil plus ferry plus 2 hours in england to get to ferry ) which all went without a hitch. We took our 5 dcs aged between 3.5 and 12. All were great - the youngest is a particularly good traveller and probided we stop regularly for poos for our 8 yr old who has a spectacular ability to poo 3 or 4 times per journey (!) and pump 12 yr old wiht quells ( travel sickness) we reckon it would be great.
Google route is through west of france and then down through switzerland and along the lenght of italy to brindisi in the south.
From there we take a ferry to greece ( not sure where yt - any advice would be amazing on that score ) and then along the coastline to athens.
I would love some recommednations for campsites - not our own tent - we will stay in mobile homes- for campsites along that route as well as tips on timescales/rest points/things to bring/avoid and general tips.
You might find it useful to have ur own tent as pre erected tents and mobile homes can be hard to book for less than 1 week. There are some, but bit hard to find? Or just use hotels till u get to ur destination? With ur own tent there's a bit more freedom.