My pleasure Ian
I got the basic route originally from a caravanning website and have refined it as we've used it. Another advantage of this route is, as I mentioned, the VERY cheap fuel at Berchen services near Luxembourg - save a few more Euros.
I have put reviews of where we stayed on caravanning4u.co.uk in their "overseas campsite reviews" section if that's of any use to you. I've, also, added information on our trips to Italyon the threads "campsites in Italy" and "we're new to caravanning please advise".
What route are you planning on using to Pisa. This year we thought we travel down to Rome partially via the west coast motorway. We bypassed Milano on the motorway and then took the A6 around Torino before turning east onto the A21 and then joined the A7 going south, bypassing Genova. We then drove down the A12 on the coast. I would NOT recommend the A12 at all for towing. It is set very high above the sea and is VERY hilly UP and DOWN plus lots of tunnels. It is only 2 lane and although a good quality surface we were CONSTANTLY hooted at by lorries unhappy with us keeping around the 80kph speed limit. the lorry problem was especially true on the downhill gradients where they could, of course, travel faster with their greater weight, whilst I had be aware of not letting our outfit run-away with itself.
The services on the A11, also, tended to be very small (litle flat land in this mountainous area) and at several we could not even find a place to park for a few minutes let alone do our favourite trick of staying overnight. There were,also, quite a few roadworks.
We were glad to turn east onto the A11 and then join the A1 near Firenze. I would advise travelling down to Pisa via the A1 south and then turn west onto the A11 near Firenze leaving only a short distance to drive on the A12 to Pisa.
I must admit we,unusually for us had not checked out the route down the A11 before we went. We gave Pisa a miss as a friend who had just visited it did not rate it very highly. He said the famous tower was in a very seedy area and advised us to give it miss - so we did. Rome on the other hand was wonderful.
All Italian autostradas are toll roads so the cost does add up.
Hope this helps
Tim