Could you not strap a kitchen fridge on the back and carry some chilled products to a ‘customer’ rear to where you are going?
Just put a ton of onions on top of the fifth wheel,perishable goods, can go anytime, anyplace.A good net and ratchet straps, and Bob` s your Uncle. 
On a serious note, a unit only may attract unwanted attention from our friendly road enforcement authorities.After a post Xmas, or New Year top up fund fund for the office party knees up.
On a positive note, you can dodge all the towns and cities that have weight limits, and save some money, by going through the center.
Parking will be much easier, if a truck stop or Rouitiers is full up for the night, there is always room to squeeze in a tractor unit.
Much higher speeds on the way down, fuel is saved, hills and mountains a doddle.
Sounds like a good trip to me.
The train from Freiburg goes to Novara.
There’s a link to their site in the Euro Drivers Info Point sticky at the top of this forums index.
You can get a 9 hour rest in while on the train but it won’t be a great sleep.
toby1234abc:
I believe Cenis has to be kept open in Winter as the milatary use it and the electricity board vehicles require access all year.
Maybe the forest trucks still use it.
Yes its called MT geneve after Grenoble
Can you imagine doing the job using the Toby Guide Book of International Lorry Driving 
I wonder which would come first, the sack or jail
