Yes, BUT. First off, pre-Rash Helsingborg and Helsingør, taken together, had half as many inhabitants as Malmö, more than Vejle (of Werehouse fame) and thrice as many as Kastrup proper - so you'd be truckin' through a serious assembly of trolls. Second, connecting the Baltic Sea to the Kattegat (which ultimately connects to the open sea), the Øresund has notable currents, and those tend to be worst where the sund gets particularly narrow ...