We are 2 senior couples planning to travel from St. Petersburg by train to Helsinki for 2 nights, then on to Tallinn by ferry, for at least 1 night. We were then thinking of taking the overnight ferry to Stockholm, but I am concerned about references to these cruises being "booze cruises". We would like to have two quiet cabins, and hope to get a good nights sleep so we can enjoy ourselves in Stockholm when we arrive. What are these cruises like in September, during the week? And also, if someone could suggest which category of room would be best for us. Thanks for your help in advance!