The Scandinavia tours start twice a week, Sundays and Tuesdays. We went on the tour this year picking the Tuesday start date. For those taking the tour in the future and who might find this post via search I thought I'd pass along the suggestion that the best day to start the Scandinavia tour is Sunday.
With the Tuesday start we were in Roskilde on Sunday to see the Cathedral. Prior to the tour you are free for lunch and on the pedestrian-only streets almost all the shops were closed because of Sunday (some restaurants were open). The following Sunday we were in Bergen on the last full day of the tour and most shops and shopping centers in Bergen are closed Sunday due to national trading laws with the exception of souvenir shops and a few small markets.
On our Tuesdays during the tour (which would have been Sundays if we had taken the Sunday start) the first was in Stockholm when we had the welcome talk and dinner, the next Tuesday was primarily a bus day with a stop in Helsingør for lunch, ending up in Varberg around 5:30pm. There is a pedestrian-only section in Helsingør but it is a little ways from the large food hall so most people just had lunch at the hall after our quick walking tour. Varberg shops were largely closed for the day after our walking tour ended. So even if we were in these locations on Sundays I don't feel like we would have missed much.
I'm curious if those who actually did start on Sunday want to share an opinion.