HOGMANAY HANGOVERS?

Touch wood please - I'm touching it anyway -  so far I can detect no blunders...

Spent half the afternoon online booking my winter expedition to Orkney via Embra. Was planning to come back after the New Year but the ferries appear to be stopping in port after the 31st December for quite a while - am guessing the crew's blood/alcohol level will take a while to simmer down?