"is easier as most."There isn't really a best route!
Came back last year over the Brenner, Lake Konstanz and Strasbourg which is easier as most.
The Basle route over the San Bernardino is better now than it used to be judging by 'Top Gear' programme.
And I've not done the Lyon route
I'm thinking of that one for the future but more for Tuscany rather than Garda.
Forgot to say - its mostly dual carriageway!Well I've taken my van over it with no problems whatsoever and that was in 1975!
And went up it last year as far as Chur.
No problems at all.