Without too much thread drift...
Especially in Italy i would be very cautious with time planning ... arrived in Genoa for refuelling and told TWR on approach only to find they just started their lunch break and sat for hours on the apron at 30+ degrees.
Lunch break is lunch break...
Such a ferry trip should be fun ... plan accordingly and you will have lots of it.
Enjoy ... usually you do not do such a trip too often
