Congratulations! We cruised the Baltics last year and it's a fantastic itinerary!
I wear jeans and t-shirts pretty much all the time during the day. No problem with jeans. Bring good walking shoes, too. You have a very port intensive cruise and comfort is imperative.
Have a great time and enjoy the magnificent Baltics!
No need to wish any longer for a great TA, such as Ngaire, where you live. Ngaire and her staff's impeccible service can be accessed by anyone, anywhere, thanks to the Internet!