So here's the itinerary I think I'm going to go with:
Sunday, May 13 | Depart Seattle | |
Monday, May 14 | Arrive Copenhagen | |
Tuesday, May 15 | Copenhagen | |
Wednesday, May 16 | Copenhagen | |
Thursday, May 17 | Early train and ferry to Ærø | |
Friday, May 18 | Morning on Ærø, followed by ferry and train to Kalmar, Sweden | |
Saturday, May 19 | Kalmar | |
Sunday, May 20 | Train to Stockholm | |
Monday, May 21 | Stockholm | |
Tuesday, May 22 | Stockholm | |
Wednesday, May 23 | Stockholm | |
Thursday, May 24 | Day in Stockholm; overnight ferry to Talinn | |
Friday, May 25 | Talinn | |
Saturday, May 26 | Ferry to Helsinki | |
Sunday, May 27 | Helsinki | |
Monday, May 28 | Helsinki | |
Tuesday, May 29 | Helsinki | |
Wednesday, May 30 | Depart Helsinki |
I might adjust things by a day here or there, but I think this is it.
Paul recommended a day trip to Uppsala while I'm in Stockholm and a daytrip to Turku and Naantali (or possibly an overnight in Turku) from Helsinki. I am also going to look into the possibility of visiting Öland while I'm in Kalmar, although that would probably necessitate renting a car for the day.