How do the tour reviews compare?
I was in Denmark, independent travel without tour, in late June and early July 2023. Large crowds in July in Copenhagen but not other areas. No crowds in June.
I define “crowd” to mean waiting for entrance to popular attractions or needing a timed admittance or pre-purchased ticket, difficulty in maneuvering around visitors to see exhibition displays, difficulty in dining with a reservation or off-peak dinner hour, center city sidewalks full of people, full transit.
Norway, Oslo and Bergen, in early to mid July was fine, no crowds although the Bergen numbers were higher than Oslo. Norway in a Nutshell was sold out on our Saturday, but not unpleasant at all.
Just one data point for Scandinavia in early July. Norway had transport disrupting rain this past summer after we had returned home. NIN routes canceled. You could check news reports on this.