I'm from EU (Slovakia) and not that far from Germany but surprisingly I have never been to Germany (not counting transit when I traveled through Germany in a train/bus or had to change flight) for some reason. I have always wanted to go but somehow I find places I want to go to more all the time so my travel to Germany keeps getting pushed down the list :D

Maybe 2-3 years ago, but at least in the cities the card acceptance is quite good. Berlin in particular and cafes in general being the exception.

… and bakeries, my god. I haven't seen a single bakery that accepts cards (EC or credit). Wanna buy €30 worth of cake to bring to work for your birthday? Nope, cash only.

Most Kamps do, some are franchise though.

I live in Munich and it still feels pretty hit and miss to me.