I am assuming you are doing the North Sydney to Aux Port Basque run.
Try and get the midnight to 7 am ferry and get a cabin and sleep. If you don't you end up spending the night before nearby, ride the noon to 6 pm and basically drive to another hotel.
The night run seems to sell out pretty far in advance so plan ahead.
If you are doing North Sydney to St Johns that is 16 hours, so you damn well better get a cabin.
We had to take the noon run. Still got a cabin. Well worth it, you can get away from everyone and have at sea sex.
Food and whatnot is actually pretty good. There is a bar too.
You will be tempted to get there early. Don't bother. Loading won't start until 90 minutes before departure. They want you there 2 hours ahead, so 2 hours and 1 minute is more than enough. Lots of people came well after the 2 hour warning.
All in all, it was a very enjoyable time except tying down the bike. Their straps blew dead goats. The ratchets were corroded with salt and you had to fight them. Plus I had to do it twice, old French dude in front of me had no idea what he was doing.
There are moose everywhere you look.