Houmeri91 wrote:...So looking to spend some time on a car park with a friend who used to be a HGV driver .
Could you find a Greek friend who could yell at you loudly in Greek interspersed with blowing a whistle while you do it? It would make the practise more realistic. Also you probably need to practise getting it within the thickness of a coat of paint of an adjacent vehicle without wing mirrors as the guy "helping" you to park will undoubtedly fold them in long before you are in position.
Definitely worth getting a cabin. I sailed once from Bari to Igoumenitsa in the aircraft seats and that was a nightmare. I didn't have a booking and all cabins had gone.