Originally Posted by
stut
You then have the option to continue via Landskrona, Lund and Malmo, or to take the ferry across to Helsingor (for Kronborg and Louisiana).
We found Louisiana all by itself to be worth a full day.
Personally I'd opt for 1 major city and its immediate area. Either Copenhagen or Stockholm offer enough for a 6 trip (don't know much about Oslo, so can't comment on it). I've never understood the appeal of dashing around to multiple cities instead of savoring one or two.