Hotel The Marquee is located on the outskirts of Castelnuovo, a 5 minute drive or 30 minute walk to the centre. The hotel has a restaurant, bar, swimming pool, free parking and free wifi (now fixed). Rooms are pleasant: mine had TV, fridge, shower and a balcony.
What sets the hotel apart is the host, Alfredo. He has lived in London and speaks excellent English. Seemingly ever-present, and always attentive, nothing is too much trouble.
I'm looking forward to going back!