We stayed there in Aug, following advise from a fellow Funster on here. We arrived at about 9pm, when they were still queueing for that nights ferry, and just drove around to the pickup/ drop off car park, and parked for the night. We did not go into the terminal to ask if it was OK, just stayed the night and nobody said anything to us. Once that nights ferry had gone and the workers had left it was quite quiet. We had a good sleep and were there ready for the ferry next morning.