In Sweden (where I am, far south, abouth 1/2 hours drive from Denmark) and Denmark breastfeeding is expected. More and more people DON'T though, I think this is a new fashion from the US! I breastfeed everywhere in public. It is a bit lonely, as it isn't done much anymore (10-15 years ago NIP was the norm, now most mothers feel too embarassed). People are unlikely to harass you though, at least here in Sweden, a Look is the worst that could happen. They're more likely to talk behind your back
. However, almost everyone plans to breastfeed, and in Sweden 90% are breastfeeding at 3 weeks.
AP is actually rather mainstream. Almost everyone has a BabyBjorn, and slings and other carriers are quite well-known (just seen as complicated, and maybe a bit hippy by most). It is mainstream to have your baby sleep in your bedroom, at least for the first year. And I know lots of people who co-sleep (it often goes with breastfeeding - practical). Gentle Discipline is quite common. There are people who do CIO - but I don't actually know anyone here who tried it, and I knew lots in NZ!
Unless you speak Danish it might be difficult to find stuff to read, but I'll look around.