Hey Chris,
Adam and I are leaving on the 29th of Dec on the 12.30am (30 Dec) Bluebridge sailing and returning on the 10.05pm Interislander on the 5 Jan. I'm going to book a car this week for that time, which I'll pick up and drop off in Picton. Happy to share fuel costs if you want a ride. Better decide asap and book the ferries as spaces are filling up.
Cher
Scott