For Copenhagen, no doubt, it was Airbnb.
For the rest – campings! Even if officially «wild camping» in Denmark is forbidden, it didn’t really bother us. During the entire good-weather-week we slept in the tent, but our sleeping bags are not forseen for the temperatures lower than 10°C, so we had to stay several times in the hotels, when the weather finished its “good” period. There exist loads of official campings, but even for “budget variant” they are quite expensive and, as a rule, demand a special camping card. Though when we were already home, it turned out that Denmark provides free camping sites with a rain shelter, fireplace, sometimes even toilets and paid shower, and without knowing that we had stayed a couple of times just there. As Denmark is a relatively urbanised country, one cross the cities and villages quite often, that spared us of carrying food supply on ourselves for the ten days coming. Long live the supermarkets; especially considering that gastronomic tourism will become popular there in the next life, probably. It’s hard to imagine how many packets of dried fruit and nuts we devoured in two weeks. (The pic below has nothing to do with nuts!)