I am thinking of doing the same. The 190/60 tyres are the lowest of the whole trad series: 16mm lower than the tyres fitted to the 4/4.
I prefer to be the last on the ferry - that way you are first off

I always tell them I am worried about ground clearance and they put you on with the trucks an buses. Also means you don't have a million idiots draging their bags down the side of your car. As above this tends to mean you load near the last and you are off amongst the first.