Ok, then. Sounds like a nice trip!
Going north through Denmark/Jutland, you may want to stop at EKVJ/Stauning, mostly because of the aircraft museum. See the ATIS subforum.
In northern Jutland, you'll find EKYT/Aalborg. That's a decent size city (for being Danish) and the airport is a not-too-long taxi ride away from the airport. Landing fee on the major Danish airports (Copenhagen excluded) is most reasonable, in the region of 10 EUR.
Don't really have a lot of tips for Norway, like I said. Weather is notoriously difficult, but since you're from the UK you may be quite used to it. Note that you can see the surface water temperature, as preparation for the crossing, here:
https://aro.lfv.se/Links/Link/ViewLink? ... 9&type=MET.
Coming down the Swedish west coast, there are several little airfields to stop at: ESGS/Strömstad and ESTF/Fjällbacka are both grass but well over 500 meters. This time of year, there may not be a lot of activity. Neither airfield is close to the nearest town/village.
Further south, there's ESGP/Gothenburg. Until 18 months ago, a really busy airport with low-cost airlines. Now, essentially only GA and helicopters remain. That has meant that the airport buses no longer run, but one can take taxi the 15 km to town.
Even further south, I can recommend ESGV/Varberg and ESMH/Höganäs. The latter has a long post in the ATIS forum.
To go to Copenhagen, your best bet is EKRK/Roskilde: taxi or bus to the town, then train to Copenhagen. Another alternative is ESMS/Malmö: you can take an airport bus to Malmö and then a train over the bridge to Copenhagen. Note that there are passport checks on these trains now due to the refugee situation.
Denmark also has several islands with airfields. EKLS/Laesoe and EKEL/Endelave are two I have personal experience from; others include EKAT/Anholt and EKSS/Samsoe.
In northern Germany, I can recommend EDHL/Lubeck. The town is close and well worth a visit. I also like EDCG/Ruegen.
Have a nice trip! If you plan to route through ESGP, send me a PM. AFAIK I'll be in town that week.
/Peter
(Check the ATIS subforum! There are threads about several of these places there.)
Autocorrect is so frustrating. It's always making me say things I didn't Nintendo.