We were in Germany last two weeks. Tourist Tax as they call it here in Austria is up to 3-4 euros a night for two persons, some sites are more it depends what council reigns.
In Germany we paid nothing near Bitberg, 1.10 euros per person per night and in Bertchesgaden we paid 1.10 euros per couple per night. It just varies which area you are stopping in.
Another thing new this year in Germany all ACSI card sites are using meters for Electricity and you are charged over using so much per night.
The price of WiFi varies a lot too Free unlimited access at Bitburg. 4.euros for 24 hours in Black Forest, not too bad, and 6 euros an hour at Bertchesgaden, too much I think.