It's 30 days to departure from Stockholm and 15 days to pack out. One final trip out of the country on the cheap Tallink ferry to Tallinn Estonia. It's an overnight trip on the boat, spend a day in old town, and an overnight trip back so it's a great adventure for a 3 day weekend. There were some noisy people both late nights roaming the halls of the boat, but it was a good trip despite that common issue. Stockholm, Helsinki, Tallinn, and Riga have ferries like this going between them daily so any of those cities can enjoy easy visits to the others.
another ferry about the same size
boat trip back to Stockholm
it's nice to sit on the deck and watch the Swedish archipelago pass by